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 arrayin_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 verticallyout_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]]
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Code #2 :
# Python program explaining# vstack() function  import numpy as geek  # input arrayin_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 verticallyout_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]]
