In this article, we will learn how to convert a NumPy Array to an image in Python. Table Of Contents How the images are stored in a computer? Convert NumPy Array to Image using fromarray() from pillow library Convert NumPy Array to Image using imsave() from matplotlib.pyplot Convert NumPy Array to Image using imwrite() from […]
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In this article, we will learn how to apply a method over a NumPy Array in Python. Table Of Contents Apply a function over a NumPy Array using vectorized function Apply a function over a NumPy Array using map() function Apply a function over a NumPy Array using Using for Loop Apply a function over
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In this article, we will learn how to remove columns from a NumPy Array which contain NaN values. Table Of Contents What is NaN value Delete columns containing atleast one NaN values using delete(), isnan() and any() Delete columns containing all NaN values using delete(), isnan() and all() Using boolean index to delete columns with
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In this article, we will learn how to remove rows with NaN values from a NumPy Array. Table Of Contents Use delete() method and boolean index to delete rows containing atleast one Nan value Use delete() method and boolean index to delete rows if entire row has nan values Use boolean index to delete rows
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In this article, we will learn how to remove elements from a Numpy Array by index position. Table Of Contents Using delete() method to delete elements from Numpy Array by Index Using delete() method to delete multiple elements from NumPy Array Using boolean array to delete elements from NumPy Array by index positions Remove elements
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In this article, we will learn how to add a number to each element of a NumPy Array in Python. Given a NumPy Array, we need to Add number to each element of NumPy Array. There are multiple ways to add number to each element of NumPy Array. Let’s discuss all the methods one by
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In this article, we will discuss different ways to replace all characters in a string with asterisks i.e. “*”. Table Of Contents Using len() function By converting into list Suppose we have a string like this, After replacing all characters in this string with asterisks, the final string should be like, Number of asterisks in
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This article will discuss different ways to replace only the last occurrence of a substring in a string. Table Of Contents Using replace() function. Using rfind() function Using rsplit() and join() Suppose we have a string, We want to replace the last occurrence of “is” with the “XX”. The final string should be like, There
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In this article, we will discuss how to replace multiple words in a string based on a dictionary. Table of Contents Using str.replace() function Using Regex Suppose we have a string, We want to replace multiple words in this string using a dictionary i.e. Keys in the dictionary are the substrings that need to be
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In this article, we will discuss different ways to replace the first occurrence of a substring from a string in Python. Suppose we have a string, In this string, the substring “is” occurs at 3 different places. But we want to replace only the first occurrence of substring “is” with “XX”. After replacement, the final
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