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subpads.cxx File Reference

Detailed Description

This ROOT 7 example demonstrates how to create a ROOT 7 canvas (RCanvas), divide on sub-sub pads and draw histograms there.

/*************************************************************************
* Copyright (C) 1995-2019, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
#include "ROOT/RCanvas.hxx"
#include "ROOT/RPad.hxx"
#include "ROOT/RStyle.hxx"
#include "TRandom.h"
// macro must be here while cling is not capable to load
// library automatically for outlined function see ROOT-10336
R__LOAD_LIBRARY(libROOTHistDraw)
void subpads()
{
using namespace ROOT::Experimental;
// Create the histogram.
RAxisConfig xaxis(25, 0., 10.);
auto pHist1 = std::make_shared<RH1D>(xaxis);
auto pHist2 = std::make_shared<RH1D>(xaxis);
auto pHist3 = std::make_shared<RH1D>(xaxis);
for (int n = 0; n < 1000; n++) {
pHist1->Fill(gRandom->Gaus(3., 0.8));
pHist2->Fill(gRandom->Gaus(5., 1.));
pHist3->Fill(gRandom->Gaus(7., 1.2));
}
// Create a canvas to be displayed.
auto canvas = RCanvas::Create("Sub-sub pads example");
// Divide canvas on sub-pads
auto subpads = canvas->Divide(2,2);
subpads[0][0]->Draw(pHist1)->line.color = RColor::kRed;
subpads[1][0]->Draw(pHist2)->line.color = RColor::kBlue;
subpads[0][1]->Draw(pHist3)->line.color = RColor::kGreen;
// Divide sub-pad on sub-sub-pads
auto subsubpads = subpads[1][1]->Divide(2,2);
subsubpads[0][0]->Draw(pHist1)->line.color = RColor::kBlue;
subsubpads[1][0]->Draw(pHist2)->line.color = RColor::kGreen;
subsubpads[0][1]->Draw(pHist3)->line.color = RColor::kRed;
"frame {" // select type frame for RFrame
" gridX: true;" // enable grid drawing
" gridY: true;"
" ticksX: 2;" // enable ticks drawing on both sides
" ticksY: 2;"
" x_labels_size: 0.05;" // below 1 is scaling factor for pad height
" y_labels_size: 20;" // just a font size in pixel
" y_labels_color: green;" // and name labels color
"}");
canvas->UseStyle(style);
canvas->SetSize(1200, 600);
canvas->Show();
RDirectory::Heap().Add("subpads_style", style); // required to keep style alive
}
#define R__LOAD_LIBRARY(LIBRARY)
Definition: Rtypes.h:472
@ kRed
Definition: Rtypes.h:66
@ kGreen
Definition: Rtypes.h:66
@ kBlue
Definition: Rtypes.h:66
R__EXTERN TRandom * gRandom
Definition: TRandom.h:62
virtual Double_t Gaus(Double_t mean=0, Double_t sigma=1)
Samples a random number from the standard Normal (Gaussian) Distribution with the given mean and sigm...
Definition: TRandom.cxx:274
const Int_t n
Definition: legend1.C:16
RModel Parse(std::string filename)
Parser function for translatng Keras .h5 model into a RModel object.
TCanvas * style()
Definition: style.C:1
Date
2018-03-13
Warning
This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback is welcome!
Author
Sergey Linev s.lin.nosp@m.ev@g.nosp@m.si.de

Definition in file subpads.cxx.