numpy.tril() in Python

numpy.tril(a, k=0) : Returns copy of array with lower part of the triangle w.r.t k
Parameters :

a : input array
k : [int, optional, 0 by default]
          Diagonal we require; k>0 means diagonal above main diagonal or vice versa.

Returns :

Lower triangle of a, having same shape and data-type as a.

# Python Programming illustrating
# numpy.tril method

import numpy as geek

# string input
a = geek.matrix([[1, 21, 30],
                 [63 ,434, 3],
                 [54, 54, 56]])

print("Main Diagonal elements : \n", geek.tril(a), "\n")

print("Diagonal above main Diagonal elements : \n", geek.tril(a, 1), "\n\n")

print("Main Diagonal elements : \n", geek.tril(a, -1))

Output :

Main Diagonal elements : 
 [[  1   0   0]
 [ 63 434   0]
 [ 54  54  56]] 

Diagonal above main Diagonal elements : 
 [[  1  21   0]
 [ 63 434   3]
 [ 54  54  56]] 


Main Diagonal elements : 
 [[ 0  0  0]
 [63  0  0]
 [54 54  0]]

References:
https://docs.scipy.org/doc/numpy/reference/generated/numpy.tril.html#numpy.tril
Note :
These NumPy-Python programs won’t run on online IDE’s, so run them on your systems to explore them
.
This article is contributed by Mohit Gupta_OMG 😀. If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to review-team@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

My Personal Notes arrow_drop_up

Save