redraw.m

% Redraw draws the points so that each cluster is a different color.
% The hubs are represented by a + and the members are represented by a *.

n = size(data,1);
pointer = zeros(n, 1);
for i=1:counter
   pointer(hubs(i))=i;   % Pointer's indices are the data point indices
                         % Pointer's cells are the hub numbers for the points
end;
hold off;

% Color code the points based on the cluster number

for i = 1:n
   x = data(i,1);
   y = data(i,2);
   if pointer(clusters(i)) == 1
      if clusters(i) == i
         plot(x, y, 'y+');
      else
         plot(x, y, 'y*');
      end
      hold on;
   elseif pointer(clusters(i)) == 2
      if clusters(i) == i
         plot(x, y, 'm+');
      else
         plot(x, y, 'm*');
      end
      hold on;

   elseif pointer(clusters(i)) == 3
      if clusters(i) == i
         plot(x, y, 'c+');
      else
         plot(x, y, 'c*');
      end
      hold on
   elseif pointer(clusters(i)) == 4
      if clusters(i) == i
         plot(x, y, 'r+');
     else
         plot(x, y, 'r*');
      end
      hold on
   elseif pointer(clusters(i)) == 5
      if clusters(i) == i
         plot(x, y, 'g+');
      else
         plot(x, y, 'g*');
      end
      hold on
   elseif pointer(clusters(i)) == 6
      if clusters(i) == i
         plot(x, y, 'b+');
      else
         plot(x, y, 'b*');
      end
      hold on
   else
      if clusters(i) == i
         plot(x, y, 'w+');
      else
         plot(x, y, 'w*');
      end
      hold on
   end
end

% Sets up the axes

x = data(:,1);
y = data(:,2);
minx = min(x);
maxx = max(x);
miny = min(y);
maxy = max(y);
axis([minx-1, maxx+1, miny - 1, maxy + 1]);