Python numpy-ndarray Archives

Delete rows and columns of NumPy ndarray

Last Updated: 21 April 2021

In this article, we will discuss how to delete the specified rows and columns in an n-dimensional array. We are going to delete the rows and columns using numpy.delete() m...read more

How to delete multiple rows of NumPy array ?

Last Updated: 23 July 2025

NumPy is the Python library that is used for working with arrays. In Python there are lists which serve the purpose of arrays but they are slow. Therefore, NumPy is there ...read more

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How to mask an array using another array in Python ?

Last Updated: 21 April 2021

In this article, we will learn how to mask an array using another array in Python. When working with data arrays or data-frames masking can be extremely useful. Masks are ...read more

How to get the number of dimensions of a matrix using NumPy in Python?

Last Updated: 23 July 2025

In this article, we will discuss how to get the number of dimensions of a matrix using NumPy. It can be found using the ndim parameter of the ndarray() method.Syntax: no_o...read more

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NumPy require() Method

Last Updated: 23 July 2025

The NumPy's require() method returns a ndarray that satisfies certain requirements.The numpy.require() method is useful for ensuring that an array has the correct flags, t...read more

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Check whether a Numpy array contains a specified row

Last Updated: 15 July 2025

In this article we will learn about checking a specified row is in NumPy array or not. If the given list is present in a NumPy array as a row then the output is True else ...read more

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NumPy who() Method | Print Arrays in Dictionary

Last Updated: 15 July 2025

The who() function of the NumPy library prints the NumPy ndarray in the given dictionary of the current module.If no dictionary is passed in or vardict is None then it pri...read more

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numpy.einsum() Method

Last Updated: 10 August 2020

In NumPy, we can find Einstein’s summation convention of two given multidimensional arrays with the help of numpy.einsum(). We will pass two arrays as a parameter and it w...read more

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Test whether the elements of a given NumPy array is zero or not in Python

Last Updated: 15 July 2025

In numpy, we can check that whether none of the elements of given array is zero or not with the help of numpy.all() function. In this function pass an array as parameter. ...read more

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How to Convert a Dictionary into a NumPy Array

Last Updated: 21 June 2025

In this article, we will learn how to convert a Python Dictionary into a numpy array which is more efficient for numerical operations and provides powerful tools for matri...read more

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Convert Python Nested Lists to Multidimensional NumPy Arrays

Last Updated: 15 July 2025

Prerequisite: Python List, Numpy ndarrayBoth lists and NumPy arrays are inter-convertible. Since NumPy is a fast (High-performance) Python library for performing mathemati...read more

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numpy.ndarray.resize() function - Python

Last Updated: 24 September 2024

numpy.ndarray.resize() function change shape and size of array in-place. Syntax : numpy.ndarray.resize(new_shape, refcheck = True) Parameters : new_shape :[tuple of ints...read more

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NumPy ndarray.dtype Property | Get Data Type of Elements in Array

Last Updated: 15 July 2025

The ndarray.dtype attribute returns the data type of the array’s elements.This attribute is read-only and cannot be modified directly.ExamplePython3 import nump...read more

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NumPy indices() Method | Create Array of Indices

Last Updated: 15 July 2025

The indices() method returns an array representing the indices of a grid.It computes an array where the subarrays contain index values 0, 1, … varying only along the corre...read more

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numpy.interp() function - Python

Last Updated: 24 September 2024

numpy.interp() function returns the one-dimensional piecewise linear interpolant to a function with given discrete data points (xp, fp), evaluated at x. Syntax : numpy.in...read more

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