Python - Numpy Array Column Deletion Last Updated : 03 Apr, 2023 Comments Improve Suggest changes Like Article Like Report Given a numpy array, write a programme to delete columns from numpy array. Examples - Input: [['akshat', 'nikhil'], ['manjeeet', 'akash']] Output: [['akshat']['manjeeet']] Input: [[1, 0, 0, 1, 0], [0, 1, 2, 1, 1]] Output: [[1 0 1 0][0 2 1 1]] Given below are various methods to delete columns from numpy array. Method #1: Using np.delete() Python3 # Python code to demonstrate # deletion of columns from numpy array import numpy as np # initialising numpy array ini_array = np.array([[1, 0, 0, 1, 0], [0, 1, 2, 1, 1]]) # deleting second column from array result = np.delete(ini_array, 1, 1) # print result print ("Resultant Array :"+str(result)) Output: Resultant Array :[[1 0 1 0] [0 2 1 1]] Time Complexity: O(n) Space Complexity: O(n) where n is length of array Method #2: Using compress() and logical_not() Python3 # Python code to demonstrate # deletion of columns from numpy array import numpy as np # initialising numpy array ini_array = np.array([[1, 0, 0, 1, 0], [1, 2, 0, 0, 1]]) z = [False, True, False, False, False] # deleting second column from array result = ini_array.compress(np.logical_not(z), axis = 1) # print result print ("Resultant Array :"+str(result)) Output: Resultant Array :[[1 0 1 0] [1 0 0 1]] Time Complexity: O(n) Space Complexity: O(n) where n is length of array Method #3: Using logical_not() Python3 # Python code to demonstrate # deletion of columns from numpy array import numpy as np # initialising numpy array ini_array = np.array([[1, 0, 0, 1, 0], [1, 2, 0, 0, 1]]) z = [False, True, False, False, False] # deleting second column from array result = ini_array[:, np.logical_not(z)] # print result print ("Resultant Array :"+str(result)) Output: Resultant Array :[[1 0 1 0] [1 0 0 1]] Time Complexity: O(n) Space Complexity: O(n) where n is length of array Comment More infoAdvertise with us Next Article Python - Numpy Array Column Deletion manjeet_04 Follow Improve Article Tags : Python Numpy Python numpy-arrayManipulation Practice Tags : python Similar Reads NumPy Array in Python NumPy (Numerical Python) is a powerful library for numerical computations in Python. 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