NumPy stack or append array to array

Question

I am starting with NumPy.

Given two np.arrays, queu and new_path:

queu = [ [[0 0]
          [0 1]]
       ]

new_p         


        

Answer 1

It's not completely clear to me how you've set up your arrays, but from the sound of it, np.vstack should indeed do what you are look for:

In [30]: queue = np.array([0, 0, 0, 1]).reshape(2, 2)

In [31]: queue
Out[31]:
array([[0, 0],
       [0, 1]])

In [32]: new_path = np.array([0, 0, 1, 0, 2, 0]).reshape(3, 2)

In [33]: new_path
Out[33]:
array([[0, 0],
       [1, 0],
       [2, 0]])

In [35]: np.vstack((queue, new_path))
Out[35]:
array([[0, 0],
       [0, 1],
       [0, 0],
       [1, 0],
       [2, 0]])