mathdatech/Python
1
0
Fork 0
mirror of https://github.com/TheAlgorithms/Python.git synced 2025-04-15 18:27:36 +00:00
Code Issues Packages Projects Releases Wiki Activity

update-GM.PY

Browse Source
This commit is contained in:
ayushbisht2001 2021-03-01 21:00:20 +05:30
parent ee9706d5dd
commit ffb7e8ed21
1 changed files with 26 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
maths/series/geometric_mean.py
View File

@ -1,3 +1,8 @@
"""
GEOMETRIC MEAN : https://en.wikipedia.org/wiki/Geometric_mean
"""
def is_geometric_series(series: list) -> bool: def is_geometric_series(series: list) -> bool:
""" """
checking whether the input series is geometric series or not checking whether the input series is geometric series or not
@ -8,14 +13,19 @@ def is_geometric_series(series: list) -> bool:
True True
>>> is_geometric_series([1, 2, 3]) >>> is_geometric_series([1, 2, 3])
False False
>>> is_geometric_series([0, 0, 3])
False
""" """
if len(series) == 1: if len(series) == 1:
return True return True
common_ratio = series[1] / series[0] try:
for index in range(len(series) - 1): common_ratio = series[1] / series[0]
if series[index + 1] / series[index] != common_ratio: for index in range(len(series) - 1):
return False if series[index + 1] / series[index] != common_ratio:
return False
except ZeroDivisionError:
return False
return True return True
@ -29,23 +39,33 @@ def geometric_mean(series: list) -> float:
8.48528137423857 8.48528137423857
>>> geometric_mean([4, 8, 16]) >>> geometric_mean([4, 8, 16])
7.999999999999999 7.999999999999999
>>> geometric_mean(4)
Traceback (most recent call last):
...
ValueError: Input series is not valid, valid series - [2, 4, 8]
>>> geometric_mean([1, 2, 3]) >>> geometric_mean([1, 2, 3])
Traceback (most recent call last): Traceback (most recent call last):
... ...
ValueError: Input list is not a geometric series ValueError: Input list is not a geometric series
>>> geometric_mean([0, 2, 3])
Traceback (most recent call last):
...
ValueError: Input list is not a geometric series
>>> geometric_mean([]) >>> geometric_mean([])
Traceback (most recent call last): Traceback (most recent call last):
... ...
ValueError: Input list must be a non empty list ValueError: Input list must be a non empty list
""" """
if not isinstance(series, list):
raise ValueError("Input series is not valid, valid series - [2, 4, 8]")
if len(series) == 0: if len(series) == 0:
raise ValueError("Input list must be a non empty list") raise ValueError("Input list must be a non empty list")
if not is_geometric_series(series): if not is_geometric_series(series):
raise ValueError("Input list is not a geometric series") raise ValueError("Input list is not a geometric series")
answer = 1 answer = 1
for _ in series: for value in series:
answer *= _ answer *= value
return pow(answer, 1 / len(series)) return pow(answer, 1 / len(series))