swh:1:snp:af87cd67498ef4fe47c76ed3e7caffe5b61facaf
Tip revision: 627b3590cf4805be9272e35afc455cb24acc41a8 authored by Unknown Author on 04 May 2004, 10:01:45 UTC
This commit was manufactured by cvs2svn to create tag 'v4-00-04'.
This commit was manufactured by cvs2svn to create tag 'v4-00-04'.
Tip revision: 627b359
hbars.C
// Example of bar charts
// Author: Rene Brun
void hbars()
{
if (gSystem->AccessPathName("cernstaff.root")) {
gROOT->ProcessLine(".x cernbuild.C");
}
TFile *f = new TFile("cernstaff.root");
TTree *T = (TTree*)f->Get("T");
T->SetFillColor(45);
TCanvas *c1 = new TCanvas("c1","histograms with bars",10,10,800,900);
c1->SetFillColor(42);
c1->Divide(1,2);
//horizontal bar chart
c1->cd(1); gPad->SetGrid(); gPad->SetLogx(); gPad->SetFrameFillColor(33);
T->Draw("Nation","","hbar2");
//vertical bar chart
c1->cd(2); gPad->SetGrid(); gPad->SetFrameFillColor(33);
T->Draw("Division>>hDiv","","goff");
TH1F *hDiv = (TH1F*)gDirectory->Get("hDiv");
hDiv->SetStats(0);
TH1F *hDivFR = (TH1F*)hDiv->Clone("hDivFR");
T->Draw("Division>>hDivFR","Nation==\"FR\"","goff");
hDiv->SetBarWidth(0.45);
hDiv->SetBarOffset(0.1);
hDiv->SetFillColor(49);
hDiv->Draw("bar2");
hDivFR->SetBarWidth(0.4);
hDivFR->SetBarOffset(0.55);
hDivFR->SetFillColor(50);
hDivFR->Draw("bar2,same");
TLegend *legend = new TLegend(0.55,0.65,0.76,0.82);
legend->AddEntry(hDiv,"All nations","f");
legend->AddEntry(hDivFR,"French only","f");
legend->Draw();
c1->cd();
}