Numpy ndarray.dot() function | Python

Last Updated : 22 Apr, 2020

numpy.ndarray.dot() function return the dot product of two arrays.

Syntax : numpy.ndarray.dot(arr, out=None)

Parameters :
arr : [array_like] Input array.
out : [ndarray, optional] Output argument.

Return : [ndarray] The dot product of two arrays.

Code #1 :

# Python program explaining 
# numpy.ndarray.dot() function 
  
# importing numpy as geek  
import numpy as geek 
  
arr1 = geek.eye(3) 
arr = geek.ones((3, 3)) * 3
  
gfg = arr1.dot( arr ) 
  
print( gfg) 

Output :

[[ 3.  3.  3.]
 [ 3.  3.  3.]
 [ 3.  3.  3.]]

Code #2 :

# Python program explaining 
# numpy.ndarray.dot() function 
  
# importing numpy as geek  
import numpy as geek 
  
arr1 = geek.eye(3) 
arr = geek.ones((3, 3)) * 3
  
gfg = arr1.dot(arr).dot(arr) 
  
print( gfg) 

Output :

[[ 27.  27.  27.]
 [ 27.  27.  27.]
 [ 27.  27.  27.]]

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Numpy ndarray.dot() function | Python

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