mirror of
https://github.com/rasbt/python_reference.git
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2348 lines
74 KiB
Plaintext
2348 lines
74 KiB
Plaintext
{
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"metadata": {
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"name": "",
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"signature": "sha256:ae8818183bc1fe6a58845005b18b12c4458686fa307a82a46857775364df6506"
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},
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"nbformat": 3,
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"nbformat_minor": 0,
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"worksheets": [
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{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"[Back to the GitHub repository](https://github.com/rasbt/python_reference)"
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]
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [
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"%load_ext watermark\n",
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"%watermark -a 'Sebastian Raschka' -v -d -p pandas"
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],
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"language": "python",
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"metadata": {},
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"outputs": [
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{
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"output_type": "stream",
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"stream": "stdout",
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"text": [
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"Sebastian Raschka 24/01/2015 \n",
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"\n",
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"CPython 3.4.2\n",
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"IPython 2.3.1\n",
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"\n",
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"pandas 0.15.2\n"
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]
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}
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],
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"prompt_number": 1
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"<font size=\"1.5em\">[More information](http://nbviewer.ipython.org/github/rasbt/python_reference/blob/master/ipython_magic/watermark.ipynb) about the `watermark` magic command extension.</font>"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"<br>\n",
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"<br>"
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]
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},
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{
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"cell_type": "heading",
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"level": 1,
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"metadata": {},
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"source": [
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"Things in Pandas I Wish I'd Had Known Earlier"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"This is just a small but growing collection of pandas snippets that I find occasionally and particularly useful -- consider it as my personal notebook. Suggestions, tips, and contributions are very, very welcome!"
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]
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},
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{
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"cell_type": "heading",
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"level": 3,
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"metadata": {},
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"source": [
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"Sections"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"- [Loading Some Example Data](#Loading-Some-Example-Data)\n",
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"- [Renaming Columns](#Renaming-Columns)\n",
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" - [Converting Column Names to Lowercase](#Converting-Column-Names-to-Lowercase)\n",
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" - [Renaming Particular Columns](#Renaming-Particular-Columns)\n",
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"- [Applying Computations Rows-wise](#Applying-Computations-Rows-wise)\n",
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" - [Changing Values in a Column](#Changing-Values-in-a-Column)\n",
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" - [Adding a New Column](#Adding-a-New-Column)\n",
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"- [Missing Values aka NaNs](#Missing-Values-aka-NaNs)\n",
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" - [Selecting NaN Rows](#Selecting-NaN-Rows)\n",
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" - [Selecting non-NaN Rows](#Selecting-non-NaN-Rows)\n",
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" - [Filling NaN Rows](#Filling-NaN-Rows)\n",
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"- [Appending Rows to a DataFrame](#Appending-Rows-to-a-DataFrame)\n",
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"- [Sorting and Reindexing DataFrames](#Sorting-and-Reindexing-DataFrames)\n",
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"- [Updating Columns](#Updating-Columns)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"<br>\n",
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"<br>"
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]
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},
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{
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"cell_type": "heading",
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"level": 1,
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"metadata": {},
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"source": [
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"Loading Some Example Data"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"[[back to section overview](#Sections)]"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"I am heavily into sports prediction (via a machine learning approach) these days. So, let us use a (very) small subset of the soccer data that I am just working with."
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]
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [
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"import pandas as pd\n",
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"\n",
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"df = pd.read_csv('https://raw.githubusercontent.com/rasbt/python_reference/master/Data/some_soccer_data.csv')\n",
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"df"
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],
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"language": "python",
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"metadata": {},
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"outputs": [
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{
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"html": [
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"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
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"<table border=\"1\" class=\"dataframe\">\n",
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" <thead>\n",
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" <tr style=\"text-align: right;\">\n",
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" <th></th>\n",
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" <th>PLAYER</th>\n",
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" <th>SALARY</th>\n",
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" <th>GP</th>\n",
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" <th>G</th>\n",
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" <th>A</th>\n",
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" <th>SOT</th>\n",
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" <th>PPG</th>\n",
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" <th>P</th>\n",
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" </tr>\n",
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" </thead>\n",
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" <tbody>\n",
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" <tr>\n",
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" <th>0</th>\n",
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" <td> Sergio Ag\u00fcero\\n Forward \u2014 Manchester City</td>\n",
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" <td> $19.2m</td>\n",
|
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" <td> 16</td>\n",
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" <td> 14</td>\n",
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" <td> 3</td>\n",
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" <td> 34</td>\n",
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" <td> 13.12</td>\n",
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" <td> 209.98</td>\n",
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" </tr>\n",
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" <tr>\n",
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" <th>1</th>\n",
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" <td> Eden Hazard\\n Midfield \u2014 Chelsea</td>\n",
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" <td> $18.9m</td>\n",
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" <td> 21</td>\n",
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" <td> 8</td>\n",
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" <td> 4</td>\n",
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" <td> 17</td>\n",
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" <td> 13.05</td>\n",
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" <td> 274.04</td>\n",
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" </tr>\n",
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" <tr>\n",
|
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" <th>2</th>\n",
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" <td> Alexis S\u00e1nchez\\n Forward \u2014 Arsenal</td>\n",
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" <td> $17.6m</td>\n",
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" <td>NaN</td>\n",
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" <td> 12</td>\n",
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" <td> 7</td>\n",
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" <td> 29</td>\n",
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" <td> 11.19</td>\n",
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" <td> 223.86</td>\n",
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" </tr>\n",
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" <tr>\n",
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" <th>3</th>\n",
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" <td> Yaya Tour\u00e9\\n Midfield \u2014 Manchester City</td>\n",
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" <td> $16.6m</td>\n",
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|
" <td> 18</td>\n",
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" <td> 7</td>\n",
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" <td> 1</td>\n",
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" <td> 19</td>\n",
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" <td> 10.99</td>\n",
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" <td> 197.91</td>\n",
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" </tr>\n",
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" <tr>\n",
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" <th>4</th>\n",
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" <td> \u00c1ngel Di Mar\u00eda\\n Midfield \u2014 Manchester United</td>\n",
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" <td> $15.0m</td>\n",
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" <td> 13</td>\n",
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" <td> 3</td>\n",
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" <td>NaN</td>\n",
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" <td> 13</td>\n",
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" <td> 10.17</td>\n",
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" <td> 132.23</td>\n",
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" </tr>\n",
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" <tr>\n",
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" <th>5</th>\n",
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" <td> Santiago Cazorla\\n Midfield \u2014 Arsenal</td>\n",
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" <td> $14.8m</td>\n",
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" <td> 20</td>\n",
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" <td> 4</td>\n",
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" <td>NaN</td>\n",
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" <td> 20</td>\n",
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" <td> 9.97</td>\n",
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" <td> NaN</td>\n",
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" </tr>\n",
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" <tr>\n",
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" <th>6</th>\n",
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" <td> David Silva\\n Midfield \u2014 Manchester City</td>\n",
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" <td> $14.3m</td>\n",
|
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" <td> 15</td>\n",
|
|
" <td> 6</td>\n",
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" <td> 2</td>\n",
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" <td> 11</td>\n",
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" <td> 10.35</td>\n",
|
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" <td> 155.26</td>\n",
|
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" </tr>\n",
|
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" <tr>\n",
|
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" <th>7</th>\n",
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" <td> Cesc F\u00e0bregas\\n Midfield \u2014 Chelsea</td>\n",
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" <td> $14.0m</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 2</td>\n",
|
|
" <td> 14</td>\n",
|
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" <td> 10</td>\n",
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" <td> 10.47</td>\n",
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" <td> 209.49</td>\n",
|
|
" </tr>\n",
|
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" <tr>\n",
|
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" <th>8</th>\n",
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" <td> Saido Berahino\\n Forward \u2014 West Brom</td>\n",
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" <td> $13.8m</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>9</th>\n",
|
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" <td> Steven Gerrard\\n Midfield \u2014 Liverpool</td>\n",
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" <td> $13.8m</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 5</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 7.50</td>\n",
|
|
" <td> 150.01</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 2,
|
|
"text": [
|
|
" PLAYER SALARY GP G A SOT \\\n",
|
|
"0 Sergio Ag\u00fcero\\n Forward \u2014 Manchester City $19.2m 16 14 3 34 \n",
|
|
"1 Eden Hazard\\n Midfield \u2014 Chelsea $18.9m 21 8 4 17 \n",
|
|
"2 Alexis S\u00e1nchez\\n Forward \u2014 Arsenal $17.6m NaN 12 7 29 \n",
|
|
"3 Yaya Tour\u00e9\\n Midfield \u2014 Manchester City $16.6m 18 7 1 19 \n",
|
|
"4 \u00c1ngel Di Mar\u00eda\\n Midfield \u2014 Manchester United $15.0m 13 3 NaN 13 \n",
|
|
"5 Santiago Cazorla\\n Midfield \u2014 Arsenal $14.8m 20 4 NaN 20 \n",
|
|
"6 David Silva\\n Midfield \u2014 Manchester City $14.3m 15 6 2 11 \n",
|
|
"7 Cesc F\u00e0bregas\\n Midfield \u2014 Chelsea $14.0m 20 2 14 10 \n",
|
|
"8 Saido Berahino\\n Forward \u2014 West Brom $13.8m 21 9 0 20 \n",
|
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"9 Steven Gerrard\\n Midfield \u2014 Liverpool $13.8m 20 5 1 11 \n",
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"\n",
|
|
" PPG P \n",
|
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"0 13.12 209.98 \n",
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"1 13.05 274.04 \n",
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"2 11.19 223.86 \n",
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"3 10.99 197.91 \n",
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"4 10.17 132.23 \n",
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"5 9.97 NaN \n",
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"6 10.35 155.26 \n",
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"7 10.47 209.49 \n",
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"8 7.02 147.43 \n",
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"9 7.50 150.01 "
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]
|
|
}
|
|
],
|
|
"prompt_number": 2
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 1,
|
|
"metadata": {},
|
|
"source": [
|
|
"Renaming Columns"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"[[back to section overview](#Sections)]"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 3,
|
|
"metadata": {},
|
|
"source": [
|
|
"Converting Column Names to Lowercase"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
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"# Converting column names to lowercase\n",
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"\n",
|
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"df.columns = [c.lower() for c in df.columns]\n",
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"\n",
|
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"# or\n",
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"# df.rename(columns=lambda x : x.lower())\n",
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"\n",
|
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"df.tail(3)"
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],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>gp</th>\n",
|
|
" <th>g</th>\n",
|
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" <th>a</th>\n",
|
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" <th>sot</th>\n",
|
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" <th>ppg</th>\n",
|
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" <th>p</th>\n",
|
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" </tr>\n",
|
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" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>7</th>\n",
|
|
" <td> Cesc F\u00e0bregas\\n Midfield \u2014 Chelsea</td>\n",
|
|
" <td> $14.0m</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 2</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 10</td>\n",
|
|
" <td> 10.47</td>\n",
|
|
" <td> 209.49</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>8</th>\n",
|
|
" <td> Saido Berahino\\n Forward \u2014 West Brom</td>\n",
|
|
" <td> $13.8m</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>9</th>\n",
|
|
" <td> Steven Gerrard\\n Midfield \u2014 Liverpool</td>\n",
|
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" <td> $13.8m</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 5</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 7.50</td>\n",
|
|
" <td> 150.01</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 3,
|
|
"text": [
|
|
" player salary gp g a sot ppg \\\n",
|
|
"7 Cesc F\u00e0bregas\\n Midfield \u2014 Chelsea $14.0m 20 2 14 10 10.47 \n",
|
|
"8 Saido Berahino\\n Forward \u2014 West Brom $13.8m 21 9 0 20 7.02 \n",
|
|
"9 Steven Gerrard\\n Midfield \u2014 Liverpool $13.8m 20 5 1 11 7.50 \n",
|
|
"\n",
|
|
" p \n",
|
|
"7 209.49 \n",
|
|
"8 147.43 \n",
|
|
"9 150.01 "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 3
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 3,
|
|
"metadata": {},
|
|
"source": [
|
|
"Renaming Particular Columns"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"df = df.rename(columns={'p': 'points', \n",
|
|
" 'gp': 'games',\n",
|
|
" 'sot': 'shots_on_target',\n",
|
|
" 'g': 'goals',\n",
|
|
" 'ppg': 'points_per_game',\n",
|
|
" 'a': 'assists',})\n",
|
|
"\n",
|
|
"df.tail(3)"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
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" <th>shots_on_target</th>\n",
|
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" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>7</th>\n",
|
|
" <td> Cesc F\u00e0bregas\\n Midfield \u2014 Chelsea</td>\n",
|
|
" <td> $14.0m</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 2</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 10</td>\n",
|
|
" <td> 10.47</td>\n",
|
|
" <td> 209.49</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>8</th>\n",
|
|
" <td> Saido Berahino\\n Forward \u2014 West Brom</td>\n",
|
|
" <td> $13.8m</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>9</th>\n",
|
|
" <td> Steven Gerrard\\n Midfield \u2014 Liverpool</td>\n",
|
|
" <td> $13.8m</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 5</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 7.50</td>\n",
|
|
" <td> 150.01</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 4,
|
|
"text": [
|
|
" player salary games goals assists \\\n",
|
|
"7 Cesc F\u00e0bregas\\n Midfield \u2014 Chelsea $14.0m 20 2 14 \n",
|
|
"8 Saido Berahino\\n Forward \u2014 West Brom $13.8m 21 9 0 \n",
|
|
"9 Steven Gerrard\\n Midfield \u2014 Liverpool $13.8m 20 5 1 \n",
|
|
"\n",
|
|
" shots_on_target points_per_game points \n",
|
|
"7 10 10.47 209.49 \n",
|
|
"8 20 7.02 147.43 \n",
|
|
"9 11 7.50 150.01 "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 4
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 1,
|
|
"metadata": {},
|
|
"source": [
|
|
"Applying Computations Rows-wise"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"[[back to section overview](#Sections)]"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 3,
|
|
"metadata": {},
|
|
"source": [
|
|
"Changing Values in a Column"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"# Processing `salary` column\n",
|
|
"\n",
|
|
"df['salary'] = df['salary'].apply(lambda x: x.strip('$m'))\n",
|
|
"df.tail()"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>5</th>\n",
|
|
" <td> Santiago Cazorla\\n Midfield \u2014 Arsenal</td>\n",
|
|
" <td> 14.8</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 4</td>\n",
|
|
" <td>NaN</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 9.97</td>\n",
|
|
" <td> NaN</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>6</th>\n",
|
|
" <td> David Silva\\n Midfield \u2014 Manchester City</td>\n",
|
|
" <td> 14.3</td>\n",
|
|
" <td> 15</td>\n",
|
|
" <td> 6</td>\n",
|
|
" <td> 2</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 10.35</td>\n",
|
|
" <td> 155.26</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>7</th>\n",
|
|
" <td> Cesc F\u00e0bregas\\n Midfield \u2014 Chelsea</td>\n",
|
|
" <td> 14.0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 2</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 10</td>\n",
|
|
" <td> 10.47</td>\n",
|
|
" <td> 209.49</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>8</th>\n",
|
|
" <td> Saido Berahino\\n Forward \u2014 West Brom</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>9</th>\n",
|
|
" <td> Steven Gerrard\\n Midfield \u2014 Liverpool</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 5</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 7.50</td>\n",
|
|
" <td> 150.01</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 5,
|
|
"text": [
|
|
" player salary games goals assists \\\n",
|
|
"5 Santiago Cazorla\\n Midfield \u2014 Arsenal 14.8 20 4 NaN \n",
|
|
"6 David Silva\\n Midfield \u2014 Manchester City 14.3 15 6 2 \n",
|
|
"7 Cesc F\u00e0bregas\\n Midfield \u2014 Chelsea 14.0 20 2 14 \n",
|
|
"8 Saido Berahino\\n Forward \u2014 West Brom 13.8 21 9 0 \n",
|
|
"9 Steven Gerrard\\n Midfield \u2014 Liverpool 13.8 20 5 1 \n",
|
|
"\n",
|
|
" shots_on_target points_per_game points \n",
|
|
"5 20 9.97 NaN \n",
|
|
"6 11 10.35 155.26 \n",
|
|
"7 10 10.47 209.49 \n",
|
|
"8 20 7.02 147.43 \n",
|
|
"9 11 7.50 150.01 "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 5
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 3,
|
|
"metadata": {},
|
|
"source": [
|
|
"Adding a New Column"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"df['team'] = pd.Series('', index=df.index)\n",
|
|
"\n",
|
|
"# or\n",
|
|
"df.insert(loc=8, column='position', value='') \n",
|
|
"\n",
|
|
"df.tail(3)"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>7</th>\n",
|
|
" <td> Cesc F\u00e0bregas\\n Midfield \u2014 Chelsea</td>\n",
|
|
" <td> 14.0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 2</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 10</td>\n",
|
|
" <td> 10.47</td>\n",
|
|
" <td> 209.49</td>\n",
|
|
" <td> </td>\n",
|
|
" <td> </td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>8</th>\n",
|
|
" <td> Saido Berahino\\n Forward \u2014 West Brom</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" <td> </td>\n",
|
|
" <td> </td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>9</th>\n",
|
|
" <td> Steven Gerrard\\n Midfield \u2014 Liverpool</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 5</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 7.50</td>\n",
|
|
" <td> 150.01</td>\n",
|
|
" <td> </td>\n",
|
|
" <td> </td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 6,
|
|
"text": [
|
|
" player salary games goals assists \\\n",
|
|
"7 Cesc F\u00e0bregas\\n Midfield \u2014 Chelsea 14.0 20 2 14 \n",
|
|
"8 Saido Berahino\\n Forward \u2014 West Brom 13.8 21 9 0 \n",
|
|
"9 Steven Gerrard\\n Midfield \u2014 Liverpool 13.8 20 5 1 \n",
|
|
"\n",
|
|
" shots_on_target points_per_game points position team \n",
|
|
"7 10 10.47 209.49 \n",
|
|
"8 20 7.02 147.43 \n",
|
|
"9 11 7.50 150.01 "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 6
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"# Processing `player` column\n",
|
|
"\n",
|
|
"def process_player_col(text):\n",
|
|
" name, rest = text.split('\\n')\n",
|
|
" position, team = rest.split(' \u2014 ')\n",
|
|
" return pd.Series([name, position, team])\n",
|
|
"\n",
|
|
"df[['player', 'team', 'position']] = df.player.apply(process_player_col)\n",
|
|
"\n",
|
|
"# modified after tip from reddit.com/user/hharison\n",
|
|
"#\n",
|
|
"# Alternative (inferior) approach:\n",
|
|
"#\n",
|
|
"#for idx,row in df.iterrows():\n",
|
|
"# name, position, team = process_player_col(row['player'])\n",
|
|
"# df.ix[idx, 'player'], df.ix[idx, 'position'], df.ix[idx, 'team'] = name, position, team\n",
|
|
" \n",
|
|
"df.tail(3)"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>7</th>\n",
|
|
" <td> Cesc F\u00e0bregas</td>\n",
|
|
" <td> 14.0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 2</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 10</td>\n",
|
|
" <td> 10.47</td>\n",
|
|
" <td> 209.49</td>\n",
|
|
" <td> Chelsea</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>8</th>\n",
|
|
" <td> Saido Berahino</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" <td> West Brom</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>9</th>\n",
|
|
" <td> Steven Gerrard</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 5</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 7.50</td>\n",
|
|
" <td> 150.01</td>\n",
|
|
" <td> Liverpool</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 7,
|
|
"text": [
|
|
" player salary games goals assists shots_on_target \\\n",
|
|
"7 Cesc F\u00e0bregas 14.0 20 2 14 10 \n",
|
|
"8 Saido Berahino 13.8 21 9 0 20 \n",
|
|
"9 Steven Gerrard 13.8 20 5 1 11 \n",
|
|
"\n",
|
|
" points_per_game points position team \n",
|
|
"7 10.47 209.49 Chelsea Midfield \n",
|
|
"8 7.02 147.43 West Brom Forward \n",
|
|
"9 7.50 150.01 Liverpool Midfield "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 7
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 1,
|
|
"metadata": {},
|
|
"source": [
|
|
"Missing Values aka NaNs"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"[[back to section overview](#Sections)]"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 3,
|
|
"metadata": {},
|
|
"source": [
|
|
"Selecting NaN Rows"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"# Selecting all rows that have NaNs in the `assists` column\n",
|
|
"\n",
|
|
"df[df['assists'].isnull()]"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>4</th>\n",
|
|
" <td> \u00c1ngel Di Mar\u00eda</td>\n",
|
|
" <td> 15.0</td>\n",
|
|
" <td> 13</td>\n",
|
|
" <td> 3</td>\n",
|
|
" <td>NaN</td>\n",
|
|
" <td> 13</td>\n",
|
|
" <td> 10.17</td>\n",
|
|
" <td> 132.23</td>\n",
|
|
" <td> Manchester United</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>5</th>\n",
|
|
" <td> Santiago Cazorla</td>\n",
|
|
" <td> 14.8</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 4</td>\n",
|
|
" <td>NaN</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 9.97</td>\n",
|
|
" <td> NaN</td>\n",
|
|
" <td> Arsenal</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 8,
|
|
"text": [
|
|
" player salary games goals assists shots_on_target \\\n",
|
|
"4 \u00c1ngel Di Mar\u00eda 15.0 13 3 NaN 13 \n",
|
|
"5 Santiago Cazorla 14.8 20 4 NaN 20 \n",
|
|
"\n",
|
|
" points_per_game points position team \n",
|
|
"4 10.17 132.23 Manchester United Midfield \n",
|
|
"5 9.97 NaN Arsenal Midfield "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 8
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 3,
|
|
"metadata": {},
|
|
"source": [
|
|
"Selecting non-NaN Rows"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"df[df['assists'].notnull()]"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>0</th>\n",
|
|
" <td> Sergio Ag\u00fcero</td>\n",
|
|
" <td> 19.2</td>\n",
|
|
" <td> 16</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 3</td>\n",
|
|
" <td> 34</td>\n",
|
|
" <td> 13.12</td>\n",
|
|
" <td> 209.98</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>1</th>\n",
|
|
" <td> Eden Hazard</td>\n",
|
|
" <td> 18.9</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 8</td>\n",
|
|
" <td> 4</td>\n",
|
|
" <td> 17</td>\n",
|
|
" <td> 13.05</td>\n",
|
|
" <td> 274.04</td>\n",
|
|
" <td> Chelsea</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>2</th>\n",
|
|
" <td> Alexis S\u00e1nchez</td>\n",
|
|
" <td> 17.6</td>\n",
|
|
" <td>NaN</td>\n",
|
|
" <td> 12</td>\n",
|
|
" <td> 7</td>\n",
|
|
" <td> 29</td>\n",
|
|
" <td> 11.19</td>\n",
|
|
" <td> 223.86</td>\n",
|
|
" <td> Arsenal</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>3</th>\n",
|
|
" <td> Yaya Tour\u00e9</td>\n",
|
|
" <td> 16.6</td>\n",
|
|
" <td> 18</td>\n",
|
|
" <td> 7</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 19</td>\n",
|
|
" <td> 10.99</td>\n",
|
|
" <td> 197.91</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>6</th>\n",
|
|
" <td> David Silva</td>\n",
|
|
" <td> 14.3</td>\n",
|
|
" <td> 15</td>\n",
|
|
" <td> 6</td>\n",
|
|
" <td> 2</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 10.35</td>\n",
|
|
" <td> 155.26</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>7</th>\n",
|
|
" <td> Cesc F\u00e0bregas</td>\n",
|
|
" <td> 14.0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 2</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 10</td>\n",
|
|
" <td> 10.47</td>\n",
|
|
" <td> 209.49</td>\n",
|
|
" <td> Chelsea</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>8</th>\n",
|
|
" <td> Saido Berahino</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" <td> West Brom</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>9</th>\n",
|
|
" <td> Steven Gerrard</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 5</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 7.50</td>\n",
|
|
" <td> 150.01</td>\n",
|
|
" <td> Liverpool</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 9,
|
|
"text": [
|
|
" player salary games goals assists shots_on_target \\\n",
|
|
"0 Sergio Ag\u00fcero 19.2 16 14 3 34 \n",
|
|
"1 Eden Hazard 18.9 21 8 4 17 \n",
|
|
"2 Alexis S\u00e1nchez 17.6 NaN 12 7 29 \n",
|
|
"3 Yaya Tour\u00e9 16.6 18 7 1 19 \n",
|
|
"6 David Silva 14.3 15 6 2 11 \n",
|
|
"7 Cesc F\u00e0bregas 14.0 20 2 14 10 \n",
|
|
"8 Saido Berahino 13.8 21 9 0 20 \n",
|
|
"9 Steven Gerrard 13.8 20 5 1 11 \n",
|
|
"\n",
|
|
" points_per_game points position team \n",
|
|
"0 13.12 209.98 Manchester City Forward \n",
|
|
"1 13.05 274.04 Chelsea Midfield \n",
|
|
"2 11.19 223.86 Arsenal Forward \n",
|
|
"3 10.99 197.91 Manchester City Midfield \n",
|
|
"6 10.35 155.26 Manchester City Midfield \n",
|
|
"7 10.47 209.49 Chelsea Midfield \n",
|
|
"8 7.02 147.43 West Brom Forward \n",
|
|
"9 7.50 150.01 Liverpool Midfield "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 9
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 3,
|
|
"metadata": {},
|
|
"source": [
|
|
"Filling NaN Rows"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"# Filling NaN cells with default value 0\n",
|
|
"\n",
|
|
"df = df.fillna(value=0)\n",
|
|
"df"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>0</th>\n",
|
|
" <td> Sergio Ag\u00fcero</td>\n",
|
|
" <td> 19.2</td>\n",
|
|
" <td> 16</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 3</td>\n",
|
|
" <td> 34</td>\n",
|
|
" <td> 13.12</td>\n",
|
|
" <td> 209.98</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>1</th>\n",
|
|
" <td> Eden Hazard</td>\n",
|
|
" <td> 18.9</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 8</td>\n",
|
|
" <td> 4</td>\n",
|
|
" <td> 17</td>\n",
|
|
" <td> 13.05</td>\n",
|
|
" <td> 274.04</td>\n",
|
|
" <td> Chelsea</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>2</th>\n",
|
|
" <td> Alexis S\u00e1nchez</td>\n",
|
|
" <td> 17.6</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 12</td>\n",
|
|
" <td> 7</td>\n",
|
|
" <td> 29</td>\n",
|
|
" <td> 11.19</td>\n",
|
|
" <td> 223.86</td>\n",
|
|
" <td> Arsenal</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>3</th>\n",
|
|
" <td> Yaya Tour\u00e9</td>\n",
|
|
" <td> 16.6</td>\n",
|
|
" <td> 18</td>\n",
|
|
" <td> 7</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 19</td>\n",
|
|
" <td> 10.99</td>\n",
|
|
" <td> 197.91</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>4</th>\n",
|
|
" <td> \u00c1ngel Di Mar\u00eda</td>\n",
|
|
" <td> 15.0</td>\n",
|
|
" <td> 13</td>\n",
|
|
" <td> 3</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 13</td>\n",
|
|
" <td> 10.17</td>\n",
|
|
" <td> 132.23</td>\n",
|
|
" <td> Manchester United</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>5</th>\n",
|
|
" <td> Santiago Cazorla</td>\n",
|
|
" <td> 14.8</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 4</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 9.97</td>\n",
|
|
" <td> 0.00</td>\n",
|
|
" <td> Arsenal</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>6</th>\n",
|
|
" <td> David Silva</td>\n",
|
|
" <td> 14.3</td>\n",
|
|
" <td> 15</td>\n",
|
|
" <td> 6</td>\n",
|
|
" <td> 2</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 10.35</td>\n",
|
|
" <td> 155.26</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>7</th>\n",
|
|
" <td> Cesc F\u00e0bregas</td>\n",
|
|
" <td> 14.0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 2</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 10</td>\n",
|
|
" <td> 10.47</td>\n",
|
|
" <td> 209.49</td>\n",
|
|
" <td> Chelsea</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>8</th>\n",
|
|
" <td> Saido Berahino</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" <td> West Brom</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>9</th>\n",
|
|
" <td> Steven Gerrard</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 5</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 7.50</td>\n",
|
|
" <td> 150.01</td>\n",
|
|
" <td> Liverpool</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 10,
|
|
"text": [
|
|
" player salary games goals assists shots_on_target \\\n",
|
|
"0 Sergio Ag\u00fcero 19.2 16 14 3 34 \n",
|
|
"1 Eden Hazard 18.9 21 8 4 17 \n",
|
|
"2 Alexis S\u00e1nchez 17.6 0 12 7 29 \n",
|
|
"3 Yaya Tour\u00e9 16.6 18 7 1 19 \n",
|
|
"4 \u00c1ngel Di Mar\u00eda 15.0 13 3 0 13 \n",
|
|
"5 Santiago Cazorla 14.8 20 4 0 20 \n",
|
|
"6 David Silva 14.3 15 6 2 11 \n",
|
|
"7 Cesc F\u00e0bregas 14.0 20 2 14 10 \n",
|
|
"8 Saido Berahino 13.8 21 9 0 20 \n",
|
|
"9 Steven Gerrard 13.8 20 5 1 11 \n",
|
|
"\n",
|
|
" points_per_game points position team \n",
|
|
"0 13.12 209.98 Manchester City Forward \n",
|
|
"1 13.05 274.04 Chelsea Midfield \n",
|
|
"2 11.19 223.86 Arsenal Forward \n",
|
|
"3 10.99 197.91 Manchester City Midfield \n",
|
|
"4 10.17 132.23 Manchester United Midfield \n",
|
|
"5 9.97 0.00 Arsenal Midfield \n",
|
|
"6 10.35 155.26 Manchester City Midfield \n",
|
|
"7 10.47 209.49 Chelsea Midfield \n",
|
|
"8 7.02 147.43 West Brom Forward \n",
|
|
"9 7.50 150.01 Liverpool Midfield "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 10
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 1,
|
|
"metadata": {},
|
|
"source": [
|
|
"Appending Rows to a DataFrame"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"[[back to section overview](#Sections)]"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"# Adding an \"empty\" row to the DataFrame\n",
|
|
"\n",
|
|
"import numpy as np\n",
|
|
"\n",
|
|
"df = df.append(pd.Series(\n",
|
|
" [np.nan]*len(df.columns), # Fill cells with NaNs\n",
|
|
" index=df.columns), \n",
|
|
" ignore_index=True)\n",
|
|
"\n",
|
|
"df.tail(3)"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>8 </th>\n",
|
|
" <td> Saido Berahino</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" <td> West Brom</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>9 </th>\n",
|
|
" <td> Steven Gerrard</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 5</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 7.50</td>\n",
|
|
" <td> 150.01</td>\n",
|
|
" <td> Liverpool</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>10</th>\n",
|
|
" <td> NaN</td>\n",
|
|
" <td> NaN</td>\n",
|
|
" <td>NaN</td>\n",
|
|
" <td>NaN</td>\n",
|
|
" <td>NaN</td>\n",
|
|
" <td>NaN</td>\n",
|
|
" <td> NaN</td>\n",
|
|
" <td> NaN</td>\n",
|
|
" <td> NaN</td>\n",
|
|
" <td> NaN</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 11,
|
|
"text": [
|
|
" player salary games goals assists shots_on_target \\\n",
|
|
"8 Saido Berahino 13.8 21 9 0 20 \n",
|
|
"9 Steven Gerrard 13.8 20 5 1 11 \n",
|
|
"10 NaN NaN NaN NaN NaN NaN \n",
|
|
"\n",
|
|
" points_per_game points position team \n",
|
|
"8 7.02 147.43 West Brom Forward \n",
|
|
"9 7.50 150.01 Liverpool Midfield \n",
|
|
"10 NaN NaN NaN NaN "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 11
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"# Filling cells with data\n",
|
|
"\n",
|
|
"df.loc[df.index[-1], 'player'] = 'New Player'\n",
|
|
"df.loc[df.index[-1], 'salary'] = 12.3\n",
|
|
"df.tail(3)"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>8 </th>\n",
|
|
" <td> Saido Berahino</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" <td> West Brom</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>9 </th>\n",
|
|
" <td> Steven Gerrard</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 5</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 11</td>\n",
|
|
" <td> 7.50</td>\n",
|
|
" <td> 150.01</td>\n",
|
|
" <td> Liverpool</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>10</th>\n",
|
|
" <td> New Player</td>\n",
|
|
" <td> 12.3</td>\n",
|
|
" <td>NaN</td>\n",
|
|
" <td>NaN</td>\n",
|
|
" <td>NaN</td>\n",
|
|
" <td>NaN</td>\n",
|
|
" <td> NaN</td>\n",
|
|
" <td> NaN</td>\n",
|
|
" <td> NaN</td>\n",
|
|
" <td> NaN</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 12,
|
|
"text": [
|
|
" player salary games goals assists shots_on_target \\\n",
|
|
"8 Saido Berahino 13.8 21 9 0 20 \n",
|
|
"9 Steven Gerrard 13.8 20 5 1 11 \n",
|
|
"10 New Player 12.3 NaN NaN NaN NaN \n",
|
|
"\n",
|
|
" points_per_game points position team \n",
|
|
"8 7.02 147.43 West Brom Forward \n",
|
|
"9 7.50 150.01 Liverpool Midfield \n",
|
|
"10 NaN NaN NaN NaN "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 12
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 1,
|
|
"metadata": {},
|
|
"source": [
|
|
"Sorting and Reindexing DataFrames"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"[[back to section overview](#Sections)]"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"# Sorting the DataFrame by a certain column (from highest to lowest)\n",
|
|
"\n",
|
|
"df = df.sort('goals', ascending=False)\n",
|
|
"df.head()"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>0</th>\n",
|
|
" <td> Sergio Ag\u00fcero</td>\n",
|
|
" <td> 19.2</td>\n",
|
|
" <td> 16</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 3</td>\n",
|
|
" <td> 34</td>\n",
|
|
" <td> 13.12</td>\n",
|
|
" <td> 209.98</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>2</th>\n",
|
|
" <td> Alexis S\u00e1nchez</td>\n",
|
|
" <td> 17.6</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 12</td>\n",
|
|
" <td> 7</td>\n",
|
|
" <td> 29</td>\n",
|
|
" <td> 11.19</td>\n",
|
|
" <td> 223.86</td>\n",
|
|
" <td> Arsenal</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>8</th>\n",
|
|
" <td> Saido Berahino</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" <td> West Brom</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>1</th>\n",
|
|
" <td> Eden Hazard</td>\n",
|
|
" <td> 18.9</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 8</td>\n",
|
|
" <td> 4</td>\n",
|
|
" <td> 17</td>\n",
|
|
" <td> 13.05</td>\n",
|
|
" <td> 274.04</td>\n",
|
|
" <td> Chelsea</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>3</th>\n",
|
|
" <td> Yaya Tour\u00e9</td>\n",
|
|
" <td> 16.6</td>\n",
|
|
" <td> 18</td>\n",
|
|
" <td> 7</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 19</td>\n",
|
|
" <td> 10.99</td>\n",
|
|
" <td> 197.91</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 13,
|
|
"text": [
|
|
" player salary games goals assists shots_on_target \\\n",
|
|
"0 Sergio Ag\u00fcero 19.2 16 14 3 34 \n",
|
|
"2 Alexis S\u00e1nchez 17.6 0 12 7 29 \n",
|
|
"8 Saido Berahino 13.8 21 9 0 20 \n",
|
|
"1 Eden Hazard 18.9 21 8 4 17 \n",
|
|
"3 Yaya Tour\u00e9 16.6 18 7 1 19 \n",
|
|
"\n",
|
|
" points_per_game points position team \n",
|
|
"0 13.12 209.98 Manchester City Forward \n",
|
|
"2 11.19 223.86 Arsenal Forward \n",
|
|
"8 7.02 147.43 West Brom Forward \n",
|
|
"1 13.05 274.04 Chelsea Midfield \n",
|
|
"3 10.99 197.91 Manchester City Midfield "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 13
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"# Optional reindexing of the DataFrame after sorting\n",
|
|
"\n",
|
|
"df.index = range(1,len(df.index)+1)\n",
|
|
"df.head()"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>1</th>\n",
|
|
" <td> Sergio Ag\u00fcero</td>\n",
|
|
" <td> 19.2</td>\n",
|
|
" <td> 16</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 3</td>\n",
|
|
" <td> 34</td>\n",
|
|
" <td> 13.12</td>\n",
|
|
" <td> 209.98</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>2</th>\n",
|
|
" <td> Alexis S\u00e1nchez</td>\n",
|
|
" <td> 17.6</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 12</td>\n",
|
|
" <td> 7</td>\n",
|
|
" <td> 29</td>\n",
|
|
" <td> 11.19</td>\n",
|
|
" <td> 223.86</td>\n",
|
|
" <td> Arsenal</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>3</th>\n",
|
|
" <td> Saido Berahino</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" <td> West Brom</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>4</th>\n",
|
|
" <td> Eden Hazard</td>\n",
|
|
" <td> 18.9</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 8</td>\n",
|
|
" <td> 4</td>\n",
|
|
" <td> 17</td>\n",
|
|
" <td> 13.05</td>\n",
|
|
" <td> 274.04</td>\n",
|
|
" <td> Chelsea</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>5</th>\n",
|
|
" <td> Yaya Tour\u00e9</td>\n",
|
|
" <td> 16.6</td>\n",
|
|
" <td> 18</td>\n",
|
|
" <td> 7</td>\n",
|
|
" <td> 1</td>\n",
|
|
" <td> 19</td>\n",
|
|
" <td> 10.99</td>\n",
|
|
" <td> 197.91</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Midfield</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 14,
|
|
"text": [
|
|
" player salary games goals assists shots_on_target \\\n",
|
|
"1 Sergio Ag\u00fcero 19.2 16 14 3 34 \n",
|
|
"2 Alexis S\u00e1nchez 17.6 0 12 7 29 \n",
|
|
"3 Saido Berahino 13.8 21 9 0 20 \n",
|
|
"4 Eden Hazard 18.9 21 8 4 17 \n",
|
|
"5 Yaya Tour\u00e9 16.6 18 7 1 19 \n",
|
|
"\n",
|
|
" points_per_game points position team \n",
|
|
"1 13.12 209.98 Manchester City Forward \n",
|
|
"2 11.19 223.86 Arsenal Forward \n",
|
|
"3 7.02 147.43 West Brom Forward \n",
|
|
"4 13.05 274.04 Chelsea Midfield \n",
|
|
"5 10.99 197.91 Manchester City Midfield "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 14
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "heading",
|
|
"level": 1,
|
|
"metadata": {},
|
|
"source": [
|
|
"Updating Columns"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"[[back to section overview](#Sections)]"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"# Creating a dummy DataFrame with changes in the `salary` column\n",
|
|
"\n",
|
|
"df_2 = df.copy()\n",
|
|
"df_2.loc[0:2, 'salary'] = [20.0, 15.0]\n",
|
|
"df_2.head(3)"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>1</th>\n",
|
|
" <td> Sergio Ag\u00fcero</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 16</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 3</td>\n",
|
|
" <td> 34</td>\n",
|
|
" <td> 13.12</td>\n",
|
|
" <td> 209.98</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>2</th>\n",
|
|
" <td> Alexis S\u00e1nchez</td>\n",
|
|
" <td> 15</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 12</td>\n",
|
|
" <td> 7</td>\n",
|
|
" <td> 29</td>\n",
|
|
" <td> 11.19</td>\n",
|
|
" <td> 223.86</td>\n",
|
|
" <td> Arsenal</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>3</th>\n",
|
|
" <td> Saido Berahino</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" <td> West Brom</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 15,
|
|
"text": [
|
|
" player salary games goals assists shots_on_target \\\n",
|
|
"1 Sergio Ag\u00fcero 20 16 14 3 34 \n",
|
|
"2 Alexis S\u00e1nchez 15 0 12 7 29 \n",
|
|
"3 Saido Berahino 13.8 21 9 0 20 \n",
|
|
"\n",
|
|
" points_per_game points position team \n",
|
|
"1 13.12 209.98 Manchester City Forward \n",
|
|
"2 11.19 223.86 Arsenal Forward \n",
|
|
"3 7.02 147.43 West Brom Forward "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 15
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"# Temporarily use the `player` columns as indices to \n",
|
|
"# apply the update functions\n",
|
|
"\n",
|
|
"df.set_index('player', inplace=True)\n",
|
|
"df_2.set_index('player', inplace=True)\n",
|
|
"df.head(3)"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>player</th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>Sergio Ag\u00fcero</th>\n",
|
|
" <td> 19.2</td>\n",
|
|
" <td> 16</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 3</td>\n",
|
|
" <td> 34</td>\n",
|
|
" <td> 13.12</td>\n",
|
|
" <td> 209.98</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>Alexis S\u00e1nchez</th>\n",
|
|
" <td> 17.6</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 12</td>\n",
|
|
" <td> 7</td>\n",
|
|
" <td> 29</td>\n",
|
|
" <td> 11.19</td>\n",
|
|
" <td> 223.86</td>\n",
|
|
" <td> Arsenal</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>Saido Berahino</th>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" <td> West Brom</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 16,
|
|
"text": [
|
|
" salary games goals assists shots_on_target \\\n",
|
|
"player \n",
|
|
"Sergio Ag\u00fcero 19.2 16 14 3 34 \n",
|
|
"Alexis S\u00e1nchez 17.6 0 12 7 29 \n",
|
|
"Saido Berahino 13.8 21 9 0 20 \n",
|
|
"\n",
|
|
" points_per_game points position team \n",
|
|
"player \n",
|
|
"Sergio Ag\u00fcero 13.12 209.98 Manchester City Forward \n",
|
|
"Alexis S\u00e1nchez 11.19 223.86 Arsenal Forward \n",
|
|
"Saido Berahino 7.02 147.43 West Brom Forward "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 16
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"# Update the `salary` column\n",
|
|
"df.update(other=df_2['salary'], overwrite=True)\n",
|
|
"df.head(3)"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>player</th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" <th></th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>Sergio Ag\u00fcero</th>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 16</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 3</td>\n",
|
|
" <td> 34</td>\n",
|
|
" <td> 13.12</td>\n",
|
|
" <td> 209.98</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>Alexis S\u00e1nchez</th>\n",
|
|
" <td> 15</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 12</td>\n",
|
|
" <td> 7</td>\n",
|
|
" <td> 29</td>\n",
|
|
" <td> 11.19</td>\n",
|
|
" <td> 223.86</td>\n",
|
|
" <td> Arsenal</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>Saido Berahino</th>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" <td> West Brom</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 17,
|
|
"text": [
|
|
" salary games goals assists shots_on_target \\\n",
|
|
"player \n",
|
|
"Sergio Ag\u00fcero 20 16 14 3 34 \n",
|
|
"Alexis S\u00e1nchez 15 0 12 7 29 \n",
|
|
"Saido Berahino 13.8 21 9 0 20 \n",
|
|
"\n",
|
|
" points_per_game points position team \n",
|
|
"player \n",
|
|
"Sergio Ag\u00fcero 13.12 209.98 Manchester City Forward \n",
|
|
"Alexis S\u00e1nchez 11.19 223.86 Arsenal Forward \n",
|
|
"Saido Berahino 7.02 147.43 West Brom Forward "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 17
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"<br>\n",
|
|
"<br>"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"collapsed": false,
|
|
"input": [
|
|
"# Reset the indices\n",
|
|
"df.reset_index(inplace=True)\n",
|
|
"df.head(3)"
|
|
],
|
|
"language": "python",
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"html": [
|
|
"<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
|
|
"<table border=\"1\" class=\"dataframe\">\n",
|
|
" <thead>\n",
|
|
" <tr style=\"text-align: right;\">\n",
|
|
" <th></th>\n",
|
|
" <th>player</th>\n",
|
|
" <th>salary</th>\n",
|
|
" <th>games</th>\n",
|
|
" <th>goals</th>\n",
|
|
" <th>assists</th>\n",
|
|
" <th>shots_on_target</th>\n",
|
|
" <th>points_per_game</th>\n",
|
|
" <th>points</th>\n",
|
|
" <th>position</th>\n",
|
|
" <th>team</th>\n",
|
|
" </tr>\n",
|
|
" </thead>\n",
|
|
" <tbody>\n",
|
|
" <tr>\n",
|
|
" <th>0</th>\n",
|
|
" <td> Sergio Ag\u00fcero</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 16</td>\n",
|
|
" <td> 14</td>\n",
|
|
" <td> 3</td>\n",
|
|
" <td> 34</td>\n",
|
|
" <td> 13.12</td>\n",
|
|
" <td> 209.98</td>\n",
|
|
" <td> Manchester City</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>1</th>\n",
|
|
" <td> Alexis S\u00e1nchez</td>\n",
|
|
" <td> 15</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 12</td>\n",
|
|
" <td> 7</td>\n",
|
|
" <td> 29</td>\n",
|
|
" <td> 11.19</td>\n",
|
|
" <td> 223.86</td>\n",
|
|
" <td> Arsenal</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" <tr>\n",
|
|
" <th>2</th>\n",
|
|
" <td> Saido Berahino</td>\n",
|
|
" <td> 13.8</td>\n",
|
|
" <td> 21</td>\n",
|
|
" <td> 9</td>\n",
|
|
" <td> 0</td>\n",
|
|
" <td> 20</td>\n",
|
|
" <td> 7.02</td>\n",
|
|
" <td> 147.43</td>\n",
|
|
" <td> West Brom</td>\n",
|
|
" <td> Forward</td>\n",
|
|
" </tr>\n",
|
|
" </tbody>\n",
|
|
"</table>\n",
|
|
"</div>"
|
|
],
|
|
"metadata": {},
|
|
"output_type": "pyout",
|
|
"prompt_number": 18,
|
|
"text": [
|
|
" player salary games goals assists shots_on_target \\\n",
|
|
"0 Sergio Ag\u00fcero 20 16 14 3 34 \n",
|
|
"1 Alexis S\u00e1nchez 15 0 12 7 29 \n",
|
|
"2 Saido Berahino 13.8 21 9 0 20 \n",
|
|
"\n",
|
|
" points_per_game points position team \n",
|
|
"0 13.12 209.98 Manchester City Forward \n",
|
|
"1 11.19 223.86 Arsenal Forward \n",
|
|
"2 7.02 147.43 West Brom Forward "
|
|
]
|
|
}
|
|
],
|
|
"prompt_number": 18
|
|
}
|
|
],
|
|
"metadata": {}
|
|
}
|
|
]
|
|
} |