numpy.vstack() in python Read Courses Practice Improve Improve Improve Like Article Like Save Article Save Report issue Report numpy.vstack() function is used to stack the sequence of input arrays vertically to make a single array. Syntax : numpy.vstack(tup) Parameters : tup : [sequence of ndarrays] Tuple containing arrays to be stacked. The arrays must have the same shape along all but the first axis. Return : [stacked ndarray] The stacked array of the input arrays. Code #1 : # Python program explaining # vstack() function import numpy as geek # input array in_arr1 = geek.array([ 1, 2, 3] ) print ("1st Input array : \n", in_arr1) in_arr2 = geek.array([ 4, 5, 6] ) print ("2nd Input array : \n", in_arr2) # Stacking the two arrays vertically out_arr = geek.vstack((in_arr1, in_arr2)) print ("Output vertically stacked array:\n ", out_arr) Output: 1st Input array : [1 2 3] 2nd Input array : [4 5 6] Output vertically stacked array: [[1 2 3] [4 5 6]] Code #2 : # Python program explaining # vstack() function import numpy as geek # input array in_arr1 = geek.array([[ 1, 2, 3], [ -1, -2, -3]] ) print ("1st Input array : \n", in_arr1) in_arr2 = geek.array([[ 4, 5, 6], [ -4, -5, -6]] ) print ("2nd Input array : \n", in_arr2) # Stacking the two arrays vertically out_arr = geek.vstack((in_arr1, in_arr2)) print ("Output stacked array :\n ", out_arr) Output: 1st Input array : [[ 1 2 3] [-1 -2 -3]] 2nd Input array : [[ 4 5 6] [-4 -5 -6]] Output stacked array : [[ 1 2 3] [-1 -2 -3] [ 4 5 6] [-4 -5 -6]] Last Updated : 06 Jan, 2019 Like Article Save Article Previous numpy.hstack() in Python Next Joining NumPy Array Share your thoughts in the comments Add Your Comment Please Login to comment...
