I need to draw a bar histogram with positive and negative values on ax Y. Something like in example hbars.C (from tutorials), but with positive and negative values.
If I specify minimal value (SetMinimum) for TH1F then all bars are drown from minimal value up to the specified value, but I want to draw them from zero up to specified value (positive or negative).
Please could somebody help me?
Thanks,
Linda
p.s.
I am newbie in root, so please forgive me if this is a stupid question.