How to divide a 3d matrix by a 2d matrix along one dimension

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Hi everybody,
I have 3d Matrix named Data, consisting of several grey scale Pictures. I want to divide it by a 2d Matix called DataMax containing the maximum intensity among the pictures at a pixel, in order to normalize Data in the 3rd dimension to 1.
I can perform the operation using a for loop:
DataMax = max(Data,[],3);
[x,y,z] = size(Data);
for k=1:z
Data(:,:,k) = Data(:,:,k)./DataMax;
end
However I would like to get rid of the loop in order to maximize performance.
Any ideas on how to do this?

Accepted Answer

Star Strider
Star Strider on 23 Aug 2018
See if bsxfun (link) will do what you want:
Data = bsxfun(@rdivide, Data, DataMax);
It is generally quite efficient.

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