Logo ROOT  
Reference Guide
draw_rh2_colz.cxx File Reference

Detailed Description

This macro generates a small V7 TH2D, fills it with random values and draw it in a V7 canvas, using configured web browser.

* Copyright (C) 1995-2020, 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/RFrameTitle.hxx"
#include "ROOT/RFrame.hxx"
#include "TRandom.h"
// macro must be here while cling is not capable to load
// library automatically for outlined function see ROOT-10336
using namespace ROOT::Experimental;
void draw_rh2_colz()
// Create the histogram.
RAxisConfig xaxis("x", 20, 0., 10.);
RAxisConfig yaxis("y", 20, 0., 10.);
auto pHist = std::make_shared<RH2D>(xaxis, yaxis);
for (int n=0;n<10000;n++)
pHist->Fill({gRandom->Gaus(5.,2.), gRandom->Gaus(5.,2.)});
// Create a canvas to be displayed.
auto canvas = RCanvas::Create("Canvas Title");
auto frame = canvas->GetOrCreateFrame();
// should we made special style for frame with palette?
// draw ticks on both sides
// swap frame side where axes are drawn
// frame->SetSwapX(true).SetSwapY(true);
canvas->Draw<RFrameTitle>("2D histogram with color palette")->SetMargin(0.01_normal).SetHeight(0.09_normal);
canvas->Draw<RPaletteDrawable>(RPalette::GetPalette(), true);
auto draw = canvas->Draw(pHist);
// draw->AttrLine().SetColor(RColor::kLime);
// draw->Surf(2); // configure surf4 draw option
// draw->Lego(2); // configure lego2 draw option
// draw->Contour(); // configure cont draw option
// draw->Scatter(); // configure color draw option (default)
// draw->Arrow(); // configure arrow draw option
draw->Color(); // configure color draw option (default)
draw->Text(true); // configure text drawing (can be enabled with most 2d options)
auto stat = canvas->Draw<RHist2StatBox>(pHist, "hist2");
canvas->SetSize(1000, 700);
// canvas->SaveAs("rh2_colz.png");
Definition: Rtypes.h:472
@ kRed
Definition: Rtypes.h:66
RAttrFill & SetColor(const RColor &color)
The fill color.
Definition: RAttrFill.hxx:39
Objects used to configure the different axis types.
Definition: RAxisConfig.hxx:35
A color palette draw near the frame.
RAttrFill & AttrFill()
Definition: RPave.hxx:67
const Int_t n
Definition: legend1.C:16
This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback is welcome!
Sergey Linev s.lin.nosp@m.ev@g.nosp@m.si.de

Definition in file draw_rh2_colz.cxx.