Save data from a loop

Question

Joshua 2012-7-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/42677-save-data-from-a-loop

Hello,

This may be simple to figure out but for some reason I can't seem to get the answer I want.

       for f=1:40;
            for g=1:40;
             for i=1:1:1600;
                    dpTxcouple1(:,:,i)=Txcouple(33,g,f)*B(:,:,1);
             end
            end
        end

What I would like to do is save each result when multiplying the element in the 33rd row of each column and page of matrix Txcouple (41x40x40) by the first page of matrix B (41x17x24). This should provide me with a matrix that is 41x17x1600 since page 1 of matrix B should be multiplied 40x40 times at the 33rd row of matrix Txcouple. When I try the code above the last result is repeated in all 1600 pages. I'm not sure what I am doing wrong but any help would be greatly appreciated!

Thank you!

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Answer 1

Geoff 2012-7-4

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https://ww2.mathworks.cn/matlabcentral/answers/42677-save-data-from-a-loop#answer_52507

在 MATLAB Online 中打开

I think this might be what you want:

for f = 1:40
  for g = 1:40
    i = (f-1) * 40 + g;
    dpTxcouple1(:,:,i) = Txcouple(33,g,f) * B(:,:,1);
  end
end

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Walter Roberson 2012-7-4

在 MATLAB Online 中打开

Another way of writing that would be

for f = 1:40
  for g = 1:40
    dpTxcouple1(:,:,f,g) = Txcouple(33,g,f) * B(:,:,1);
  end
end
dpTxcouple1 = reshape( dpTxcouple1, size(dpTxcouple1,1), size(dpTxcouple1,2), 40*40 );