Problem with double use of a for loop?

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Ivan Mich 2022-11-13

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https://ww2.mathworks.cn/matlabcentral/answers/1849693-problem-with-double-use-of-a-for-loop

评论： Stephen23 2022-11-14

I have a problem aith a code. I have 2 matrices , A and B. Matrix A has 3x3 dimensions, while matrix B has 1x3 dimensions. I would like to minus (remove with "-"), the (1,1) number of B from each one number (each line) of the 1st column of A matrix.

After that, I I would like to minus (remove with "-"), the (1,2) number of B from each one number (each line) of the 2nd column of A matrix.

Last, I would like to minus (remove with "-"), the (1,3) number of B from each one number (each line) of the 3rd column of A matrix.

I tried these commands:

ndata=size(A,1)
[rows columns] = size(B);
for jj=1:size(A,1);
    for zz=(columns);
   
       MINUS(jj)=(A(:,jj))- B(1,zz);
        
    end
end

but no use. Could you please help me?

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Steven Lord 2022-11-14

One potential reason to use a for loop would be if the poster is using an older release of MATLAB, one that predates the introduction of implicit expansion. Another is if this is a homework assignment and the professor or teacher that assigned the work forbade the students from using implicit expansion.

Stephen23 2022-11-14

"One potential reason to use a for loop would be if the poster is using an older release of MATLAB, one that predates the introduction of implicit expansion"

https://www.mathworks.com/help/matlab/ref/bsxfun.html

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