make 2 dimention array by two 1 dimension

Question

It might be too simple question though,,

I want to make

from

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

to

[[1,2,3],
[4,5,6]]

+ ,concatenate, append neither doesn't work.

Does this answer your question? [How to append numpy arrays?](https://stackoverflow.com/questions/41523942/how-to-append-numpy-arrays) — Mykola Zotko, Dec 23 '20 at 17:31

score 3 · Accepted Answer · answered Dec 23 '20 at 17:17

3

How about vstack:

np.vstack([a,b])

Or stack:

np.stack([a,b], axis=0)

Output:

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

answered Dec 23 '20 at 17:17

Quang Hoang

or `np.array((a,b))` which is essentially `np.array([[1,2,3],[4,5,6]])`. – hpaulj Dec 23 '20 at 17:49

1 Answers1