creating tables from matrices

Hi, I'm trying to create multiple matrices from one main matrix using a for loop, but I'm getting an error message, and I think it has to do with using 'm' and 'p' as numbers in my matrix. Here is the code. Please help!

Thanks

for i=400
  n=0;
  m=1+n;
  p=20+n;
  table_increments_12_GPX_ratio=table_12_GPX_ratio_3_14_12(m:p,3);
  n=n+1;
end

[the cyclist]

Telling us the error message would certainly help in diagnosing the problem.

[Jan]

The loop body does not depend on the loop counter i. n is set to 0 in each iteration and increased by 1 at the end, but reset to 0 in the next iteration. This is most likely not wanted.