How do I loop a matrix with multiple changing variables ?

I'm trying to fill in a matrix with 3 changing variables.

Example: I've got a dataset M, with 10 different values in each colon. So I say:

A= M(:,10)

B= M(:,11)

C= M(:,12)

I'm trying to fill these in into this matrix:

if true
  % code
R = [A A+B A+C;
     B+A B B+C;
     C+A C+B C]
end

So for the first value A=1, B=2 and C=3 the matrix should look like:

if true
  % code
[1 3 4;
3 2 5;
4 5 3]
end

How can I loop this so it will give me 10 matrices?

[Stephen23]

Adam's answer is the way to go. Do NOT try to create or access multiple variable in a loop, this makes for very buggy and slow code:

http://www.mathworks.com/matlabcentral/answers/196952-how-to-create-new-variables-in-batches-with-strcat

Answer 1

[Adam]

R = [A; A+B; A+C; B+A; B; B+C; C+A; C+B; C];

will give you the 10 matrices as columns of R which can be reshaped to 3*3 if required. e.g.

R = reshape( R, [3 3 10] );

then R(:,:,1) will be the first upto R(:,:,10) the 10th.