% dependence of histogram on number of rolls:
nrolls = [ 20, 100, 1000 ];
for i = [1:length(nrolls)]
  d = rollthedie( nrolls(i) );
  % plain hist:
  %hist( d )

  % check bin counts of plain hist:
  % h = hist( d )

  % force 6 bins:
  %hist( d, 6 )

  % set the right bin centers:
  %bins = 1:6;
  %hist( d, bins )

  % normalize histogram and compare to expectation:
  hold on
  plot( [0 7], [1/6 1/6], '-r', 'linewidth', 10 )
  hist( d, bins, 1.0, 'facecolor', 'b' )
  hold off
  pause
end