24 lines
470 B
Python
24 lines
470 B
Python
|
import numpy as np
|
||
|
|
def variancediy(data1, data2=None):
|
||
|
|
if data2 is None:
|
||
|
|
c = data1
|
||
|
|
else:
|
||
|
|
|
||
|
|
data22 =[data2]
|
||
|
|
|
||
|
|
c = data1+data22
|
||
|
|
|
||
|
|
n = len(c)
|
||
|
|
if n > 1:
|
||
|
|
mean = sum(c) / n
|
||
|
|
else:
|
||
|
|
mean = sum(c)
|
||
|
|
deviations = [(x - mean) ** 2 for x in c]
|
||
|
|
if n > 1:
|
||
|
|
variance = sum(deviations) / (n - 1)
|
||
|
|
else:
|
||
|
|
variance = sum(deviations)
|
||
|
|
if len(data1) == 0:
|
||
|
|
variance = float('inf')
|
||
|
|
return variance
|