Divide a matrix with an array along a specific dimension

A=rand(10,20,30);
B=[1:30];
I want to divide A with B along the third dimension. I got the required result using loop.
for ii=1:30
C(:,:,ii)=A(:,:,ii)/B(ii);
end
But is there any pre-defined function which does the same operation, which takes the dimension as a input along which we want to divide a matrix.

 Réponse acceptée

Stephen23
Stephen23 le 16 Mar 2018
Modifié(e) : Stephen23 le 16 Mar 2018
Once you make the sizes compatible you can do this using standard methods without any loop. Use permute or reshape to get the correct size of B. For example In R2016b and later a standard rdivide will do this:
A ./ reshape(B,1,1,[])
or for earlier versions use bsxfun:
bsxfun(@rdivide,A,reshape(B,1,1,[]))

Plus de réponses (1)

How about using arrayfun ?
C = arrayfun(@(k) A(:,:,k)./B(k), 1:30,'UniformOutput',false);
C = cat(3,C{:});

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