MATLAB: For loop confusion!

Question

ind1 = 1:6;
for t2=1:size(mm_r,3);
    if t2 <= 6
        wt_r = mm_r(1:361,1:361,ind1);
        wint2_r(:,:,t2) = mean(wt_r,3); %wint2_r is of 361*361*6
          ind1 = ind1+6;
      else
      end      
  end

To calculate the sequential differences I want to write this part in for loop, but it is not working out the way i want lets say an_r of size 361*361*5

anom_90_84_r = wint2_r(:,:,2) - wint2_r(:,:,1);
anom_96_90_r = wint2_r(:,:,3) - wint2_r(:,:,2);
anom_02_96_r = wint2_r(:,:,4) - wint2_r(:,:,3);
anom_08_02_r = wint2_r(:,:,5) - wint2_r(:,:,4);
anom_15_08_r = wint2_r(:,:,6) - wint2_r(:,:,5);

Answer 1

I think you can skip the loops and use diff:

an_r = diff(wint2_r,1,3);