Hi Mark,
An other possible way is the attached example.
Cheers, Olivier
On Thu, 15 Apr 2004, Rene Brun wrote:
> Hi Mark,
>
> 2-D histograms with axis coordinates increasing from right to left are
> not supported. However, you can visualize a 2-D histogram with the option "surf"
> by setting the viewing angles such that, eg the x axis coordinates will go
> from right to left as shown in the small example below.
>
> Rene Brun
>
> {
> TH2F *hpxpy = new TH2F("hpxpy","py vs px",40,-4,4,40,-4,4);
> Float_t px, py;
> TRandom r;
> for (Int_t i = 0; i < 25000; i++) {
> r.Rannor(px,py);
> hpxpy->Fill(px,py);
> }
> TCanvas *c1 = new TCanvas("c1");
> c1->SetTheta(90.001);
> c1->SetPhi(90.001);
> hpxpy->Draw("surf2");
> }
>
>
> Mark Polsen wrote:
> >
> > Hello all,
> >
> > Is there a way to reverse the lower and upper ranges for a TH2D? I'm
> > using 2D histograms to display astrophysical sources in galactic
> > coordinates. Currently, I can only display the longitude coordinates
> > increasing from left to right. I'd like to display the longitude
> > coordinates increasing from right to left.
> >
> > Thanks,
> > Mark
>
>
--
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