Problem with double use of a for loop?

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?

[Stephen23]

M = A-B % why do you need to use nested loops?

[Ivan Mich]

Because I want to have a result of 3x3 matrix and I think that loop is neccessary for my purpose..

[Stephen23]

"Because I want to have a result of 3x3 matrix and I think that loop is neccessary for my purpose"

It works for me without loops, using arrays of the sizes that you gave in your question:

A = randi(9,3,3)

A = 3×3

9 6 8 5 7 2 1 8 7

B = randi(9,1,3)

B = 1×3

9 8 3

C = A-B

C = 3×3

0 -2 5 -4 -1 -1 -8 0 4

https://www.mathworks.com/help/matlab/matlab_prog/compatible-array-sizes-for-basic-operations.html

It is unclear what you expect to gain using nested FOR loops.

[Steven Lord]

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]

"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

Answer 1

[Stephen23]

A-B