Python | numpy.fill_diagonal() method

Python | Numpy matrix.diagonal()

Last Updated : 12 Apr, 2019

With the help of Numpy matrix.diagonal() method, we are able to find a diagonal element from a given matrix and gives output as one dimensional matrix.

Syntax : matrix.diagonal() Return : Return diagonal element of a matrix

Example #1 : In this example we can see that with the help of matrix.diagonal() method we are able to find the elements in a diagonal of a matrix.

Python3 1==

# import the important module in python
import numpy as np
       
# make matrix with numpy
gfg = np.matrix('[6, 2; 3, 4]')
       
# applying matrix.diagonal() method
geeks = gfg.diagonal()
 
print(geeks)

Output:

[[6 4]]

Example #2 :

Python3 1==

# import the important module in python
import numpy as np
       
# make a matrix with numpy
gfg = np.matrix('[1, 2, 3; 4, 5, 6; 7, 8, 9]')
       
# applying matrix.diagonal() method
geeks = gfg.diagonal()
 
print(geeks)

Output:

[[1 5 9]]

Python | numpy.fill_diagonal() method

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