How to do it...

Perform the following steps:

1. Import all necessary modules:

import cv2, numpy as np

2. Create a matrix with random values initialization and print its attributes:

mat = np.random.rand(100, 100).astype(np.float32)
print('Shape:', mat.shape)
print('Data type:', mat.dtype)

3. Save our random matrix to the file with the np.savetxt function:

np.savetxt('mat.csv', mat)

4. Now, load it from the file we've just written and print its shape and type:

mat = np.loadtxt('mat.csv').astype(np.float32)
print('Shape:', mat.shape)
print('Data type:', mat.dtype)