function ok = GetErrorPlot(imageC, u)
% ok = GetErrorPlot(imageIndex, u)
% This function Draws an error plot for a given image
% Author : Sasakthi Abeysinghe, Timothy Simpson
% Date   : 04/05/2006

global imageWidth;
global imageHeight;
global x;
global error;

image0 = reshape(imageC, imageHeight,imageWidth, 3);
error = double(size(u,2));
for i=1:size(u,2),
    error(i) = GetError(image0, ReconstructImage(imageC, u, i));
end   

plot([1:1:size(u,2)], error);
title('Reconstruction error using Principle Components'); 
xlabel('Principle Components used');
ylabel('Error (Squared difference)');
set(findobj(gca,'Type','line','Color',[0 0 1]),'Color','red','LineWidth',2)