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hihell/pairwise_var.py

Created December 7, 2020 18:46
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pairwise variation
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pairwise_var.py
import numpy as np
n = 3
d = np.random.randn(n)
acc = 0
for i in range(n):
for j in range(n):
acc += (d[i] - d[j])**2
pairwise_var1 = acc / (n*(n)) / 2
pairwise_var2 = acc / (2*n*(n-1)) / 2
var = np.var(d)
print('pairwise1:', pairwise_var1, 'pairwise2:', pairwise_var2, 'var:', var)
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