bsxfun implementation in matrix multiplication

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Send x to the third dimension, so that singleton expansion would come into effect when bsxfun is used for multiplication with A, extending the product result to the third dimension. Then, perform the bsxfun multiplication –

val = bsxfun(@times,A,permute(x,[3 1 2]))

Now, val is a 3D matrix and the desired output is expected to be a 2D matrix concatenated along the columns through the third dimension. This is achieved below –

out = reshape(permute(val,[1 3 2]),size(val,1)*size(val,3),[])

Hope that made sense! Spread the bsxfun word around! woo!! 🙂

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