MATLAB: Creating an array within a for loop

arraycreateforloopplotvariable

I have a plotting function which gets the points to plot from a for loop, i.e.
 for i=1:length(rat2ind)
       ind = A(:,1)==A(rat2ind(i),1);  % pick all the rat locs for rat i
       plot(A(ind,2),A(ind,3),randcolor);axis([-0.5 7.5, -0.5 7.5])  % plot rat i trajectory 
       hold on;
    end
but instead of plotting the points, I'd like to save the points in an (n,2) array. I tried this:
   for i=1:length(rat2ind)
          ind = A(:,1)==A(rat2ind(i),1);
          H=vertcat(H,[A(ind,1),A(ind,2),A(ind,3)]);
      end
but it gave me a variable which is definitely not what I needed as its twice as large as my original data (the data, and my actual goal isn't really relevant here)
Thanks for any help

Best Answer

Thanks for the help, turns out that this function is exactly what I wanted:
http://www.mathworks.co.uk/matlabcentral/fileexchange/29692-repeated-values#comments
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