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#include "TFile.h"
#include "TCanvas.h"
#include "TNtuple.h"
#include "TSpider.h"
// script illustrating the use of the TSpider class
//Author: Bastien Dallapiazza
void spider() {
TCanvas *c1 = new TCanvas("c1","TSpider example",200,10,700,700);
TFile *f = new TFile("$ROOTSYS/tutorials/hsimple.root");
if (!f || f->IsZombie()) {
printf("Please run <ROOT location>/tutorials/hsimple.C before.");
return;
}
TNtuple* ntuple = (TNtuple*)f->Get("ntuple");
TString varexp = "px:py:pz:random:sin(px):log(px/py):log(pz)";
TString select = "px>0 && py>0 && pz>0";
TString options = "average";
TSpider *spider = new TSpider(ntuple,varexp.Data(),select.Data(),options.Data());
spider->Draw();
c1->ToggleEditor();
c1->Selected(c1,spider,1);
}
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