hsumanim¶
This script is a slightly modified version of hsum.C.
Uncomment the two c1->Print(...); lines in order to produce
an animated gif file. The option "++" makes an infinite animation.
The animated file hsumanim.gif can be visualized within a web browser
Author: Rene Brun, Valeriy Onuchin
This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Monday, February 06, 2023 at 11:14 AM.
In [1]:
auto c1 = new TCanvas("c1","The HSUM example",200,10,600,400);
c1->SetGrid();
gBenchmark->Start("hsum");
Create some histograms.
In [2]:
auto total = new TH1F("total","This is the total distribution",100,-4,4);
auto main = new TH1F("main","Main contributor",100,-4,4);
auto s1 = new TH1F("s1","This is the first signal",100,-4,4);
auto s2 = new TH1F("s2","This is the second signal",100,-4,4);
total->Sumw2(); // this makes sure that the sum of squares of weights will be stored
total->SetMarkerStyle(21);
total->SetMarkerSize(0.7);
main->SetFillColor(16);
s1->SetFillColor(42);
s2->SetFillColor(46);
TSlider *slider = 0;
gSystem->Unlink("hsumanim.gif"); // delete old file
Fill histograms randomly
In [3]:
gRandom->SetSeed();
const Int_t kUPDATE = 500;
Float_t xs1, xs2, xmain;
Int_t gifcnt = 0;
for ( Int_t i=0; i<10000; i++) {
xmain = gRandom->Gaus(-1,1.5);
xs1 = gRandom->Gaus(-0.5,0.5);
xs2 = gRandom->Landau(1,0.15);
main->Fill(xmain);
s1->Fill(xs1,0.3);
s2->Fill(xs2,0.2);
total->Fill(xmain);
total->Fill(xs1,0.3);
total->Fill(xs2,0.2);
if (i && (i%kUPDATE) == 0) {
if (i == kUPDATE) {
total->Draw("e1p");
main->Draw("same");
s1->Draw("same");
s2->Draw("same");
c1->Update();
slider = new TSlider("slider","test",4.2,0,4.6,total->GetMaximum(),38);
slider->SetFillColor(46);
}
if (slider) slider->SetRange(0,Float_t(i)/10000.);
c1->Modified();
c1->Update();
if (gROOT->IsBatch()) {
// c1->Print("hsumanim.gif+");
printf("i = %d\n", i);
} else {
if (gSystem->ProcessEvents())
break;
}
}
}
slider->SetRange(0,1);
total->Draw("sameaxis"); // to redraw axis hidden by the fill area
c1->Modified();
i = 500 i = 1000 i = 1500 i = 2000 i = 2500 i = 3000 i = 3500 i = 4000 i = 4500 i = 5000 i = 5500 i = 6000 i = 6500 i = 7000 i = 7500 i = 8000 i = 8500 i = 9000 i = 9500
c1->Print("hsumanim.gif++")
In [4]:
gBenchmark->Show("hsum");
hsum : Real Time = 1.47 seconds Cpu Time = 1.00 seconds
Draw all canvases
In [5]:
gROOT->GetListOfCanvases()->Draw()
