Sample variance formula is:

Variance formula is:

To calculate sample variance of a matrix, you can compute variance first.

**Preliminaries**

import numpy as np

**Create a matrix**

m = np.array([[2, 3, 5],[1, 4, 6]])

The result is:

array([[2, 3, 5], [1, 4, 6]])

**Compute variance of matrix**

v = np.var(m)

The result is:

2.9166666666666665

**Compute sample variance**

sv = v * (m.size/((m.size - 1)*1.0))

The result is:

3.4999999999999996