Re: Difference of columns

[Ismael Núñez-Riboni]

> > Suppose that we have N columns in a matrix, how we can perform a
> > program that take into account all possible differences between these
> > N columns.

You need a double loop, I see no other (easy) way, if your matrix is A:

cc = 1;

for i = 1:N
   for j = 1:N
      diff(:,cc) = A(:,i) - A(:,j);

      cc = cc +1;
   end
end

Cheers, Ismael.