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rh3.cxx File Reference

Detailed Description

This macro generates a small RH3D, fills it with random values and draw it in RCanvas, 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/RHist.hxx"
#include "ROOT/RCanvas.hxx"
#include "ROOT/RPad.hxx"
#include "ROOT/RFrameTitle.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)
using namespace ROOT::Experimental;
void rh3()
{
// Create the histogram.
RAxisConfig xaxis("x", 10, -5., 5.);
RAxisConfig yaxis("y", 10, -5., 5.);
RAxisConfig zaxis("z", 10, -5., 5.);
auto pHist = std::make_shared<RH3D>(xaxis, yaxis, zaxis);
for (int n=0;n<10000;n++)
pHist->Fill({gRandom->Gaus(0.,2.), gRandom->Gaus(0.,2.), gRandom->Gaus(0.,2.)});
// Create a canvas to be displayed.
auto canvas = RCanvas::Create("RH3D drawing options");
// Divide canvas on 2x2 sub-pads to show different draw options
auto subpads = canvas->Divide(2,2);
// default draw option
subpads[0][0]->Draw<RFrameTitle>("Box(0) default draw option");
subpads[0][0]->Draw(pHist)->Box(0).fill = RAttrFill(RColor::kBlue, RAttrFill::kSolid);
// sphere draw options
subpads[1][0]->Draw<RFrameTitle>("Sphere(1) draw option");
subpads[1][0]->Draw(pHist)->Sphere(1);
// text draw options
subpads[0][1]->Draw<RFrameTitle>("Color() draw option");
subpads[0][1]->Draw(pHist)->Color();
// arrow draw options
subpads[1][1]->Draw<RFrameTitle>("Scatter() draw option");
subpads[1][1]->Draw(pHist)->Scatter().fill = RAttrFill(RColor::kBlack, RAttrFill::kSolid);
canvas->SetSize(1000, 700);
canvas->Show();
}
#define R__LOAD_LIBRARY(LIBRARY)
Definition Rtypes.h:472
Drawing fill attributes for different objects.
Definition RAttrFill.hxx:26
Objects used to configure the different axis types.
const Int_t n
Definition legend1.C:16
Date
2020-06-18
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 rh3.cxx.