Multiply all pages of a matrix
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souperman1985
am 15 Jan. 2021
Beantwortet: Bruno Luong
am 15 Jan. 2021
I have a 2x2xn matrix and I want to multiply all pages together. I know I can do it using a loop. Is there any way that does NOT require looping, however? Thanks!
aMat=reshape(1:20,[2,2,5])
bMat = aMat(:,:,1)*aMat(:,:,2)*aMat(:,:,3)*aMat(:,:,4)*aMat(:,:,5)
cMat = eye(2);
for i=1:size(aMat,3)
cMat = cMat*aMat(:,:,i);
end
cMat
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Bruno Luong
am 15 Jan. 2021
AFAIK there is no alternative way in general; unless your matrices has special property that can use some simplification.
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