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41 lines
1.3 KiB
Python
41 lines
1.3 KiB
Python
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# Random Forest Regression
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# Importing the libraries
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import numpy as np
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import matplotlib.pyplot as plt
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import pandas as pd
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# Importing the dataset
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dataset = pd.read_csv('Position_Salaries.csv')
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X = dataset.iloc[:, 1:2].values
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y = dataset.iloc[:, 2].values
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# Splitting the dataset into the Training set and Test set
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"""from sklearn.cross_validation import train_test_split
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X_train, X_test, y_train, y_test = train_test_split(X, y, test_size = 0.2, random_state = 0)"""
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# Feature Scaling
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"""from sklearn.preprocessing import StandardScaler
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sc_X = StandardScaler()
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X_train = sc_X.fit_transform(X_train)
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X_test = sc_X.transform(X_test)
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sc_y = StandardScaler()
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y_train = sc_y.fit_transform(y_train)"""
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# Fitting Random Forest Regression to the dataset
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from sklearn.ensemble import RandomForestRegressor
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regressor = RandomForestRegressor(n_estimators = 10, random_state = 0)
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regressor.fit(X, y)
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# Predicting a new result
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y_pred = regressor.predict(6.5)
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# Visualising the Random Forest Regression results (higher resolution)
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X_grid = np.arange(min(X), max(X), 0.01)
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X_grid = X_grid.reshape((len(X_grid), 1))
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plt.scatter(X, y, color = 'red')
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plt.plot(X_grid, regressor.predict(X_grid), color = 'blue')
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plt.title('Truth or Bluff (Random Forest Regression)')
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plt.xlabel('Position level')
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plt.ylabel('Salary')
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plt.show()
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