Vectorize many matrix multiplications using the third dimension
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I have collections of matrices, say two collections A and B of n matrices each, implemented as cell arrays. I would like to produce a third collection C by multiplying the matrices from the first two collections:
C = cell(1, n);
for i = 1:n
C{i} = A{i} * B{i};
end
Is it possible instead to use 3D arrays to vectorize this operation? Suppose that A and B are m x m x n arrays, where the ith page (where i ranges from 1 to n) of the arrays are the same as the ith cell in the previous example. Then, is it possible to write something that would look like
C = A * B;
to perform the multiplications in a way that is transparent for the pages of A and B?
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James Tursa
2019-4-17
1 个投票
See this link:
And see these FEX submissions:
MTIMESX: (mex, needs C-compiler)
MMX: (mex, needs C-compiler)
MULTIPROD: (M-code)
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