numpy.tri() in Python (original) (raw)

Last Updated : 09 Mar, 2022

numpy.tri(R, C = None, k = 0, dtype = ‘float’) : Creates an array with 1’s at and below the given diagonal(about k) and 0’s elsewhere.
Parameters :

R : Number of rows C : [optional] Number of columns; By default R = C k : [int, optional, 0 by default] Diagonal we require; k>0 means diagonal above main diagonal or vice versa. dtype : [optional, float(byDefault)] Data type of returned array.

import numpy as geek

print ( "tri with k = 1 : \n" ,geek.tri( 2 , 3 , 1 , dtype = float ), "\n" )

print ( "tri with main diagonal : \n" ,geek.tri( 3 , 5 , 0 ), "\n" )

print ( "tri with k = -1 : \n" ,geek.tri( 3 , 5 , - 1 ), "\n" )

Output :

tri with k = 1 : [[ 1. 1. 0.] [ 1. 1. 1.]]

tri with main diagonal : [[ 1. 0. 0. 0. 0.] [ 1. 1. 0. 0. 0.] [ 1. 1. 1. 0. 0.]]

tri with k = -1 : [[ 0. 0. 0. 0. 0.] [ 1. 0. 0. 0. 0.] [ 1. 1. 0. 0. 0.]]

References :
https://docs.scipy.org/doc/numpy/reference/generated/numpy.tri.html
Note :
These NumPy-Python programs won’t run on online IDE’s, so run them on your systems to explore them
.