% implements Error_Rate, returns nothing but prints the percentage of
% predicted labels that are incorrrect.
function [] = Error_Rate(predictions, labels)

  % compute error rate and print it out
  c = 0;
  [total_rows, ~] = size(predictions);

  for i = 1:total_rows
      if predictions(i) == labels(i)
          c = c + 1;
      end
  end

  fprintf('Rate: %.1f%% (%d / %d)\n', 100 * c / total_rows, c, total_rows);
  
end % Function end