## More efficient way to multiply each column of a 2-d matrix by each slice of a 3-d matrix

I have an 8x8x25000 array W and an 8 x 25000 array r. I want to multiple each 8x8 slice of W by each column (8x1) of r and save the result in Wres, which will end up being an 8x25000 matrix.
I am accomplishing this using a for loop as such:
for i i...

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