Mulitple Histogram plot with bars

I am trying to create two histograms on a plot. I tried this

 [n, xout] = hist(data(1:179396,1));
  bar(xout, n, 'barwidth', 1, 'basevalue', 1); hold;
  Current plot held

[n2, xout2] = hist(data(1:179484,1));
bar(xout2, n2, 'barwidth', 1, 'basevalue', 1);
set(gca, 'XTick', 0:20:1000)
set(gca,'YScale','log')

 and I got the "Index exceeds matrix dimensions" error. 
I was wondering if anyone could help me. I know it should give that error. but I was wondering if there is a way to get around this.

[Oleg Komarov]

PLease format your code: http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup#answer_18099

[Anthony]

thanks Oleg.

[Chaowei Chen]

I didn't get errors from your code! Hooray?