doc/v636/save__batch_8C.html

void save_batch()

{

   // 37 canvases will be collected together for conversion

   TWebCanvas::BatchImageMode(37);


   auto c = new TCanvas("canvas", "Canvas with histogram");


   auto h1 = new TH1I("hist", "Histogram with random data", 100, -5., 5);

   h1->SetDirectory(nullptr);

   h1->FillRandom("gaus", 10000);

   h1->Draw();


   for (int n = 0; n < 100; ++n) {

      h1->FillRandom("gaus", 10000);

      c->SaveAs(TString::Format("batch_image_%03d.png", n));

   }


   // Important - disabling batch mode also flush remaining images

   TWebCanvas::BatchImageMode(0);

}

c
#define c(i)
Definition RSha256.hxx:101

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

TCanvas
The Canvas class.
Definition TCanvas.h:23

TH1I
1-D histogram with an int per channel (see TH1 documentation)
Definition TH1.h:795

TH1::SetDirectory
virtual void SetDirectory(TDirectory *dir)
By default, when a histogram is created, it is added to the list of histogram objects in the current ...
Definition TH1.cxx:8933

TH1::FillRandom
virtual void FillRandom(TF1 *f1, Int_t ntimes=5000, TRandom *rng=nullptr)
Definition TH1.cxx:3500

TH1::Draw
void Draw(Option_t *option="") override
Draw this histogram with options.
Definition TH1.cxx:3038

TString::Format
static TString Format(const char *fmt,...)
Static method which formats a string using a printf style format descriptor and return a TString.
Definition TString.cxx:2378

TWebCanvas::BatchImageMode
static void BatchImageMode(UInt_t n=100)
Configure batch image mode for web graphics.
Definition TWebCanvas.cxx:159

n
const Int_t n
Definition legend1.C:16

h1
TH1F * h1
Definition legend1.C:5