Stacking Along Rows

NumPy offers a helper function called hstack() for stacking arrays along rows.

import numpy as np

arr1 = np.array([1, 2, 3])

arr2 = np.array([4, 5, 6])

arr = np.hstack((arr1, arr2))

print(arr)

Stacking Along Columns

NumPy provides the vstack() helper function to stack arrays along columns.

import numpy as np

arr1 = np.array([1, 2, 3])

arr2 = np.array([4, 5, 6])

arr = np.vstack((arr1, arr2))

print(arr)

NumPy offers the dstack() helper function to stack arrays along the height, also referred to as the depth.

import numpy as np

arr1 = np.array([1, 2, 3])

arr2 = np.array([4, 5, 6])

arr = np.dstack((arr1, arr2))

print(arr)