I'm trying to create a classification system using artificial immune systems but I don't know how to create the loop properly.

So, I need to create a set of random detectors and then compare them with the real cases using "pdist2". When "pdist2" is under a certain value (0.5), the case is atributed as being part of the respective detector. However, this detector is only valid if it reaches a minimum number of "detections" ((size(percentage,1)/size(X,1))*3).

 X=zeros(50,16); 

 for k=1:size(X,2)
    for j=1:size(X,1)
        X(j,k)=percentage_min(1,k)+rand(1,1)*(percentage_max(1,k)-percentage_min(1,k));
    end
 end

 D=pdist2(X,percentage);
 T=zeros(size(D,1),1);
 U=zeros(size(X));

 for k=1:size(D,1)
        for j=1:size(D,2)
            if  D(k,j)<0.5
                T(k)=T(k)+1; 
            end
                if T(k)>(size(percentage,1)/size(X,1))*3
                   U(k,:)=X(k,:);   
                end 
        end
 end

This part of the code is working properly. However, now I need to delete the already atributed cases, create another set of detectors (overwriting X) and use "pdist2" again, until almost all cases are atributed (lets say, per example, while size(percentage,1)>500). When I say to delete a case, I mean to delete a row of "percentage". However, when I do this inside the loop, it never stops. And I also already tried to make the loop backwards but I have the same problem.

 while size(percentage,1)>500
    for k=1:size(D,1)
        for j=1:size(D,2)
            if  D(k,j)<0.5
                T(k)=T(k)+1; 
                percentage(k,:)=[];
            end
                if T(k)>(size(percentage,1)/size(X,1))*3
                   U(k,:)=X(k,:);   
                end
                    for m=1:size(X,2)
                        for n=1:size(X,1)
                            X(n,m)=percentage_min(1,m)+rand(1,1)*(percentage_max(1,m)-percentage_min(1,m));
                        end
                    end
                   D=pdist2(X,percentage);
                   T=zeros(size(D,1),1); 
        end
    end
 end

This part of the code is not working, but I hope you can understand what I want. Can somebody please help me? And I have 2 other minor problems: when a case is atributed to a detector, it shouldn't be atributed to another one (T should be incremented only once by each case, so total sum should be size(percentage,1)). And when a detector is saved on U, that position shouldn't be overwritten by a new detector.