Re: drawing exclusion area in histograms

Nevermind... this is essentially how it's supposed to work I guess. And as long as I specify the boundaries for the histograms it works pretty well. So please disregard my previous mails. Thank you.
Cheers

Stephan Zimmer wrote:
> Hi Rooters,
> to specify the previous question.
> I have a histogram (no tree!) and I want to draw an exclusion area. I've
> tried the TCutG class. However when i specify the points it's quite
> messy plus I need to specify them in general coordinates otherwise they
> will be plotted to the wrong place in my canvas. Is there an easy way of
> saying for instance I have a histogram and for a certain bin range this
> histogram is overlaid by a rectangle? Something like this?
>
> {
> TH1D *h1gaus = new TH1D("h1gaus","gaus",100,-10,10);
> for (int i = 0; i<1000000; i++) h1gaus->Fill(TMath::Pi()*gRandom->Gaus());
> TCanvas c1;
> c1->DrawFrame(-10.,0.,10.0,30000);
>
> TCutG *atlasdr = new TCutG("atlasdr",5);
> atlasdr->SetVarX("");
> atlasdr->SetVarY("");
> atlasdr->SetPoint(0,-10.,0.);
> atlasdr->SetPoint(1,-5.8,0.);
> atlasdr->SetPoint(2,-5.8,30000.);
> atlasdr->SetPoint(3,-10.,30000.);
> atlasdr->SetPoint(4,-10,0);
> atlasdr->SetFillColor(2);
> atlasdr->SetFillStyle(3004);
> atlasdr->Draw("F");
> h1gaus->Draw("same");
> }
>
> Here it is pretty annoying that I have to draw the histogram as the last
> piece. Is there an easier way???
> Thank you very much,
> Cheers,
> Stephan
Received on Fri Nov 20 2009 - 05:00:28 CET