# Example 1: Use concatenate() to join two arrays

con = np.concatenate((arr, arr1))

print(con)

​

# Example 2: Use concatenate() with axis

con = np.concatenate((arr, arr1), axis=1)

print(con)

​

# Example 3: Use np.stack() function to Join Arrays

con = np.stack((arr, arr1), axis=1)

print(con)

​

# Example 4: Use np.hstack() function

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

print(con)

​

# Example 5: Use np.vstack() function 

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

print(con)

​

# Example 6: Use np.dstack() function to Stacking Along Height (depth)

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

print(con)

>>> a = np.array([[1, 2], [3, 4]])

>>> b = np.array([[5, 6]])

>>> np.concatenate((a, b), axis=0)

array([[1, 2],

       [3, 4],

       [5, 6]])

>>> np.concatenate((a, b.T), axis=1)

array([[1, 2, 5],

       [3, 4, 6]])

​

>>> a = np.array([[1, 2], [3, 4]])

>>> b = np.array([[5, 6]])

>>> np.concatenate((a, b), axis=0)

array([[1, 2],

       [3, 4],

       [5, 6]])

>>> np.concatenate((a, b.T), axis=1)

array([[1, 2, 5],

       [3, 4, 6]])

>>> np.concatenate((a, b), axis=None)

array([1, 2, 3, 4, 5, 6])

​

a = np.array([1, 2, 3, 4])

b = np.array([5, 6, 7, 8])

np.concatenate((a, b))

​

numpy.concatenate((a1, a2, ...), axis)

​

numpy.concatenate((arr1, arr2, …), axis=0, out=None)