np stack

1>>> a = np.array([1, 2, 3])
2>>> b = np.array([2, 3, 4])
3>>> np.stack((a, b))
4array([[1, 2, 3],
5       [2, 3, 4]])
6

1>>> np.stack((a, b), axis=-1)
2array([[1, 2],
3       [2, 3],
4       [3, 4]])
5

1>>> np.stack((a, b), axis=-1)
2array([[1, 2],
3       [2, 3],
4       [3, 4]])
5

1>>> a = np.array([1, 2, 3])
2>>> b = np.array([2, 3, 4])
3>>> np.stack((a, b))
4array([[1, 2, 3],
5       [2, 3, 4]])
6