numpy.vstack() in Python
numpy.vstack() in Python
The numpy.vstack() function stacks the arrays in a sequence vertically (row wise).
Syntax
numpy.vstack(tup)
Parameter
tup: This parameter represents the sequence of ‘ndarrays’ where the arrays must have the same shape along all except the first axis.
Return
This function returns the array formed by stacking the given arrays, will be at least 2-D.
Example 1
# Python program explaining
# numpy.vstack() function
import numpy as np
inp_array1 = np.array([[ 11, 12, 13], [ -11, -12, -13]] )
print ("Input array: ", inp_array1)
inp_array2 = np.array([[ 14, 15, 16], [ -14, -15, -16]] )
print ("Input array: ", inp_array2)
#stacks the arrays in a sequence vertically (row wise)
out_array = np.vstack((inp_array1, inp_array2))
print ("Output array: ", out_array)
Output
Input array: [[ 11 12 13] [-11 -12 -13]] Input array: [[ 14 15 16] [-14 -15 -16]] Output array: [[ 11 12 13] [-11 -12 -13] [ 14 15 16] [-14 -15 -16]]