% implements Eigenfaces, returns nothings but displays a plot of the first
% 5 eigenvectors
function [] = Eigenfaces(training_data, test_data)

   % stack data 
   data = vertcat(training_data, test_data);

   % TODO: perform PCA

   % TODO: show the first 5 eigenvectors (see homework for example)
   imagesc(reshape(faces_data(i,1:end-1),32,30)')

end % Function end