how to add values of each iteration to a variable?

i have to store the values of every iteration.. but i got only the last values.. what correct i have to do? here is my code

    if true
      [loc,ctr]=kmeans(hogfeat,20);
 b=unique(loc);
 for i=1:size(b,1)
   c=hogfeat(find(loc==b(i,1)));
 end
    end

Answer 1

[Walter Roberson]

c{i} = hogfeat(find(loc==b(i,1)));

[sheno39]

thank you sir.. i got my answer..