Multiple, add, and divide element-wise and more with matrices.

Matrix arithmetics

In [2]:

import numpy as np

In [7]:

# create first 2D numpy array
lst = [[1, 2, 3], [4, 5, 6]]
array = np.array(lst_2, float)
array

Out[7]:

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

In [10]:

# create second 2D numpy array
lst_2 = [[7, 8, 9], [10, 11, 12]]
array_2 = np.array(lst_2)
array_2

Out[10]:

array([[ 7,  8,  9],
       [10, 11, 12]])

In [11]:

# element-wise addition
array + array_2

Out[11]:

array([[  8.,  10.,  12.],
       [ 14.,  16.,  18.]])

In [12]:

# element-wise subtractaction
array_2 - array

Out[12]:

array([[ 6.,  6.,  6.],
       [ 6.,  6.,  6.]])

In [13]:

# element-wise multiplication
array * array_2

Out[13]:

array([[  7.,  16.,  27.],
       [ 40.,  55.,  72.]])

Tags: numpy