numpy.tri() in Python Last Updated : 09 Mar, 2022 Suggest changes Share Like Article Like Report 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. Python # Python Program illustrating # numpy.tri method 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://numpy.org/doc/stable/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 . M Mohit Gupta Article Tags : Misc Python Python-numpy Python numpy-arrayCreation Explore Python FundamentalsPython Introduction 2 min read Input and Output in Python 4 min read Python Variables 5 min read Python Operators 4 min read Python Keywords 2 min read Python Data Types 7 min read Conditional Statements in Python 3 min read Loops in Python - For, While and Nested Loops 5 min read Python Functions 5 min read Recursion in Python 4 min read Python Lambda Functions 5 min read Python Data StructuresPython String 5 min read Python Lists 4 min read Python Tuples 4 min read Python Dictionary 3 min read Python Sets 6 min read Python Arrays 7 min read List Comprehension in Python 4 min read Advanced PythonPython OOP Concepts 11 min read Python Exception Handling 5 min read File Handling in Python 4 min read Python Database Tutorial 4 min read Python MongoDB Tutorial 2 min read Python MySQL 9 min read Python Packages 10 min read Python Modules 7 min read Python DSA Libraries 15 min read List of Python GUI Library and Packages 3 min read Data Science with PythonNumPy Tutorial - Python Library 3 min read Pandas Tutorial 4 min read Matplotlib Tutorial 5 min read Python Seaborn Tutorial 15+ min read StatsModel Library- Tutorial 4 min read Learning Model Building in Scikit-learn 8 min read TensorFlow Tutorial 2 min read PyTorch Tutorial 6 min read Web Development with PythonFlask Tutorial 8 min read Django Tutorial | Learn Django Framework 7 min read Django ORM - Inserting, Updating & Deleting Data 4 min read Templating With Jinja2 in Flask 6 min read Django Templates 7 min read Python | Build a REST API using Flask 3 min read How to Create a basic API using Django Rest Framework ? 4 min read Python PracticePython Quiz 3 min read Python Coding Practice 1 min read Python Interview Questions and Answers 1 min read My Profile ${profileImgHtml} My Profile Edit Profile My Courses Join Community Transactions Logout Like