Aggregate Numpy Array By Summing

Question

I have a Numpy array of shape (4320,8640). I would like to have an array of shape (2160,4320).

You\'ll notice that each cell of the new array m

Answer 1

I'm not sure there exists the package you want, but this code will compute much faster.

>>> arrtrans2 = arr[::2, ::2] + arr[::2, 1::2] + arr[1::2, ::2] + arr[1::2, 1::2]
>>> numpy.allclose(arrtrans, arrtrans2)
True

Where ::2 and 1::2 are translated by 0, 2, 4, ... and 1, 3, 5, ... respectively.