numpy calculate mean code example

Example 1: numpy mean

>> import numpy as np 
>> a=[1,2,3,4,5]
>> np.mean(a)
3.0

Example 2: numpy average

import numpy as np 
a = np.arange(6).reshape(3,2) 
average = np.average(a)

Example 3: python mean ndarray

# define ndarray a
a = np.array([[1, 2], [3, 4]])
# get the mean 
np.mean(a, axis=None)