I falled into a mud pit just now. The terminal is a black and white and I
choose red bar color. It become 'invisible' then. When I show it in a
colored terminal, it works.
I still can not manipulate the color freely in a macro since I do not 
know which color number corresponds to which color. Is there such a 
corresponding list somewhere ?
Have you read my last message about the malfunction of 'TGTab' ? What
could be the problem ?
Sincerely , Xie
> > In file 'hsimple.C' at turtorial directory, when I add in Draw() a
> > 'bar chart' option like followed, the figure becomes invisible.
> >             ..........
> >            hpx->Draw("b");
> >            hpx->SetBarOffset(0.25);
> >            hpx->SetBarWidth(0.5);
> >             .........
> > 
> > Sincerely, Xie
> 
> I cannot reproduce this problem.
> Please send me the exact macro you are using.
> 
> Rene Brun
>