How to create larger matrix within a loop?

 I have the code below, I need to create a matrix with all DATA values in the rows
 (DATA_new=[DATA;DATA;....] but the problem is that the MATLAB save the last value
 of DATA. I don't know how I can have a bigger matrix with all DATA vectors! Does 
anyone know that?

    for m=0:11;

    m=m+1;

    for n=1:15;

        DATA =[m,n]

    end

end

Answer 1

[Azzi Abdelmalek]

DATA=[]
for m=0:11;
   m=m+1;
   for n=1:15;
       DATA =[DATA;m,n]
   end
end

You can do it without for loop

[x,y]=meshgrid(1:12,1:15)
DATA=[x(:) y(:)]

[Sophi gra]

Thank you very much. it did work!