Numpy concatenate 2D arrays with 1D array

Question

I am trying to concatenate 4 arrays, one 1D array of shape (78427,) and 3 2D array of shape (78427, 375/81/103). Basically this are 4 arrays with features for 78427 images,

Answer 1

You can try this one-liner:

concat = numpy.hstack([a.reshape(dim,-1) for a in [Cscores, Mscores, Tscores, Yscores]])

The "secret" here is to reshape using the known, common dimension in one axis, and -1 for the other, and it automatically matches the size (creating a new axis if needed).