Python numpy-arrayManipulation Archives

How to Remove columns in Numpy array that contains non-numeric values?

Last Updated: 25 October 2020

Many times we have non-numeric values in NumPy array. These values need to be removed, so that array will be free from all these unnecessary values and look more decent. I...read more

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numpy.ma.compress_rowcols() function in Python

Last Updated: 12 November 2020

numpy.ma.compress_rowcols() function suppresses rows and columns that contain masked values in a 2-D array. The suppression behavior is selected with the axis parameter: I...read more

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numpy.ma.compress_cols() function in Python

Last Updated: 12 November 2020

Prerequisite: numpyThis numpy inbuilt function suppresses whole columns that contain masked values in a 2-D array.Syntax: numpy.ma.compress_cols(arr) Parameters : arr : [...read more

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Flatten A list of NumPy arrays

Last Updated: 16 September 2021

Prerequisite Differences between Flatten() and Ravel() Numpy Functions, numpy.ravel() in Python, In this article, we will see how we can flatten a list of numpy arrays. Nu...read more

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How to append two NumPy Arrays?

Last Updated: 09 August 2021

Prerequisites: NumpyTwo arrays in python can be appended in multiple ways and all possible ones are discussed below.Method 1: Using append() methodThis method is used to A...read more

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Convert a 1D array to a 2D Numpy array

Last Updated: 08 September 2022

Here we will learn how to convert 1D NumPy to 2D NumPy Using two methods. Numpy is a Python package that consists of multidimensional array objects and a collection of ope...read more

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How to remove array rows that contain only 0 using NumPy?

Last Updated: 20 August 2021

Numpy library provides a function called numpy.all() that returns True when all elements of n-d array passed to the first parameter are True else it returns False. Thus, t...read more

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NumPy - Filtering rows by multiple conditions

Last Updated: 10 October 2022

In this article, we will discuss how to filter rows of NumPy array by multiple conditions. Before jumping into filtering rows by multiple conditions, let us first see how ...read more

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Comparing and Filtering NumPy array

Last Updated: 22 February 2023

In this article, we are going to see how to perform a comparison and filtering of the NumPy array.Comparing NumPy Array:Let's see the comparison operators that will be use...read more

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How to filter two-dimensional NumPy array based on condition ?

Last Updated: 13 October 2022

In this article, we are going to see how to apply the filter by the given condition in NumPy two-dimensional array. We have to obtain the output of required elements i.e.,...read more

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How to Set Axis for Rows and Columns in NumPy ?

Last Updated: 07 November 2022

In this article, we are going to see how to set the axis for rows and columns in NumPy.Functions Usednp.array(object): to create a NumPy array, the object is the parameter...read more

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How to remove rows from a Numpy array based on multiple conditions ?

Last Updated: 03 July 2021

In this article, we will learn how to remove rows from a NumPy array based on multiple conditions. For doing our task, we will need some inbuilt methods provided by the Nu...read more

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Counting the number of non-NaN elements in a NumPy Array

Last Updated: 03 April 2023

In this article, we are going to see how to count the number of non-NaN elements in a NumPy array in Python.NAN: It is used when you don't care what the value is at that p...read more

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How to Map a Function Over NumPy Array?

Last Updated: 03 June 2025

Mapping a function over a NumPy array means applying a specific operation to each element individually. This lets you transform all elements of the array efficiently witho...read more

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How to Return a Boolean Array True Where the String Array Ends with Suffix Using NumPy?

Last Updated: 13 July 2022

In this article, we will discuss how to return a boolean array that is True where the string element in the array ends with a suffix using NumPy in Python.Example: Check t...read more

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