Re: [ROOT] TH1 histogram

From: Rene Brun (Rene.Brun@cern.ch)
Date: Sun Apr 16 2000 - 23:20:37 MEST


Hi Thomas,
Version 2.24/02 fixes this problem with logx and variable
bin size histograms. Problem was originally reported
by Gilles Zalamansky

Rene Brun



On Sun, 16 Apr 2000, Thomas Hadig wrote:

> Dear Rooters,
> 
> what mistake do i make:
> 
> Running :
> 
> {
> TCanvas *c1 = new TCanvas("data1","");
> c1->SetLogx(1);
> c1->Draw();
> 
> TH1F *h2 = new TH1F("","",1, 0.01, 1);
> h2->SetMaximum(10);
> 
> Float_t x[4]= { 0.1, 0.2, 0.4, 0.5 };
> Float_t y[3]= { 1.1, 1.2, 1.4 };
> h2->Draw();
> 
> TH1F *h = new TH1F("","",3, x);
> h->SetBinContent(1,y[0]);
> h->SetBinContent(2,y[1]);
> h->SetBinContent(3,y[2]);
> 
> h->Draw("same");
> }
> 
> gives:
> Error in <TGraph::PaintGraphHist>: X must have N+1 values with option N
> 
> but it has ... 3 bins -> 4 x-values
> 
> Ciao
> Thomas
> 
> ----------------------------------------------------------------------------
> Thomas Hadig, Ottensen, Donnerstr. 20, 22763 Hamburg  Tel.  +49 40 39901186
> OFFICE : DESY/H1, 1a334, Notkestr. 85, 22607 Hamburg  Tel.  +49 40 8998 2733
>      hadig@rwth-aachen.de                             Handy +49 170 7807434   
>      http://www-h1.desy.de/~hadig/                    FAX   +49 40 8998 4385
> ----------------------------------------------------------------------------
>       PLEASE NOTE THE NEW OFFICE, OFFICE PHONE AND MOBILE PHONE !!!!!
> ----------------------------------------------------------------------------
> 



This archive was generated by hypermail 2b29 : Tue Jan 02 2001 - 11:50:24 MET