I want to reduce the repeated for loops as i explained below. any help??

when SS =1 , KK loop should not take the value from 1 to 3

when SS = 2:23 , KK loop should not run for SS-1:SS+1

when SS =24 , KK loop should not take the value from 22 to 24

I am able to get the answer but i dont want to repeat the same code for three times. how to resolve the problem???

for ss = 1
    for kk = setdiff(1:no_receivers+1,1:3)
        for ii = 1:no_gridsx
                             dist(ii,1:250,kk,ss) = sqrt((apert_x(1,ss)-X(ii,1:250)).^2+(apert_y(1,ss)-Y(ii,1:250)).^2)+sqrt((X(ii,1:250)-apert_x(1,kk)).^2+(Y(ii,1:250)-apert_y(1,kk)).^2);
                  end
     end
end
for ss = 2:23
    for kk = setdiff(1:no_receivers+1,ss-1:ss+1)
        for ii = 1:no_gridsx
                          dist(ii,1:250,kk,ss) = sqrt((apert_x(1,ss)-X(ii,1:250)).^2+(apert_y(1,ss)-Y(ii,1:250)).^2)+sqrt((X(ii,1:250)-apert_x(1,kk)).^2+(Y(ii,1:250)-apert_y(1,kk)).^2);
                     end
     end
end
for ss = 24
    for kk = setdiff(1:no_receivers+1,22:24)
        for ii = 1:no_gridsx
                              dist(ii,1:250,kk,ss) = sqrt((apert_x(1,ss)-X(ii,1:250)).^2+(apert_y(1,ss)-Y(ii,1:250)).^2)+sqrt((X(ii,1:250)-apert_x(1,kk)).^2+(Y(ii,1:250)-apert_y(1,kk)).^2);
                end
     end
end

[Image Analyst]

I rescued this from the spam quarantine.

Answer 1

[Guillaume]

One way:

kk_indices = {setdiff(1:no_receivers+1,1:3);
              setdiff(1:no_receivers+1,ss-1:ss+1);
              setdiff(1:no_receivers+1,22:24)};
for ss = 1:24
    kk_s = kk_indices{(ss > 1) + (ss > 23) + 1}; %(ss>1) + (ss>23) + 1 will be 1 for ss = 1, 2 for ss = 2:23 and 3 for ss = 24
    for kk = kk_s
        %your ii loop here
    end
end

Note that the

for s = 1
    %some code
end

you wrote is pointless. It is the same as the more straighforward

ss = 1
%some code