Hi Tony,
This is a complement to my previous answer
Rene Brun
Colley, Tony wrote:
>
> When I draw a Bar Chart (I am using TH1 with draw option "bar2"), is there a
> way to specify that the bars should be drawn from 0 (zero) rather than from
> the minimum Y value. That is, I would like bins with positive values to be
> drawn as bars extending from the X axis upwards, and bins with negative
> values to be drawn as bars extending from the X axis downwards.
>
This is now implemented (by default) in the CVS head.
> Also, is it intentional that combining "barX" (where X>0) with "P" or "C" or
> "L" would cause the histogram to look like I used "bar0" -- that is, the
> dark & light edges are not drawn, or are drawn with width=0 (which is
> effectively the same thing)?
The barX option should not be used (currently) with other options like
"c","l","p". To get what you want, proceed as indicated in the example
below
void bar2() {
TCanvas *c1 = new TCanvas("c1");
TH1F *h = new TH1F("h","h",20,-4,4);
h->FillRandom("gaus",500);
h->SetFillColor(50);
h->SetLineColor(4);
h->SetLineWidth(4);
h->SetMarkerStyle(21);
h->DrawCopy("bar2");
h->SetFillColor(0);
h->Draw("cp same");
}
>
> Thanks,
> Tony
>
> +------------------------------------------------+
> | Tony Colley ITT Industries A/CD |
> | Modeling/Simulation Group Fort Wayne, IN USA |
> +------------------------------------------------+
> | Using ROOT 3.03/04 on RedHat Linux 7.2 |
> | Last CVS update: 29 Apr 2002 at 13:23 GMT |
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