doc/v636/tree140__spider_8C.html

#include "TFile.h"

#include "TCanvas.h"

#include "TNtuple.h"

#include "TSpider.h"


void tree140_spider()

{

   auto c1 = new TCanvas("c1", "TSpider example", 200, 10, 700, 700);

   auto f = TFile::Open("hsimple.root");

   if (!f || f->IsZombie()) {

      printf("Please run <ROOT location>/tutorials/hsimple.C before.");

      return;

   }

   auto ntuple = f->Get<TNtuple>("ntuple");

   TString varexp = "px:py:pz:random:sin(px):log(px/py):log(pz)";

   TString selection = "px>0 && py>0 && pz>0";

   TString options = "average";

   auto spider = new TSpider(ntuple, varexp.Data(), selection.Data(), options.Data());

   spider->Draw();

   c1->ToggleEditor();

   c1->Selected(c1, spider, 1);

}

f
#define f(i)
Definition RSha256.hxx:104

TCanvas.h

TRangeDynCast
ROOT::Detail::TRangeCast< T, true > TRangeDynCast
TRangeDynCast is an adapter class that allows the typed iteration through a TCollection.
Definition TCollection.h:358

TFile.h

TNtuple.h

TSpider.h

ROOT::Detail::TRangeCast
Definition TCollection.h:311

TCanvas
The Canvas class.
Definition TCanvas.h:23

TFile::Open
static TFile * Open(const char *name, Option_t *option="", const char *ftitle="", Int_t compress=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault, Int_t netopt=0)
Create / open a file.
Definition TFile.cxx:4131

TNtuple
A simple TTree restricted to a list of float variables only.
Definition TNtuple.h:28

TSpider
Spider class.
Definition TSpider.h:40

TString
Basic string class.
Definition TString.h:139

TString::Data
const char * Data() const
Definition TString.h:376

c1
return c1
Definition legend1.C:41