histops.cxx

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/// \file
/// \ingroup tutorial_v7
///
/// \macro_code
///
/// \date 2015-08-08
/// \warning This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback
/// is welcome!
/// \author Axel Naumann <axel@cern.ch>

/*************************************************************************
 * Copyright (C) 1995-2015, 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/THist.hxx"
#include <iostream>

void histops()
{

   using namespace ROOT;
   // Create a 2D histogram with an X axis with equidistant bins, and a y axis
   // with irregular binning.
   Experimental::TH2D hist1({100, 0., 1.}, {{0., 1., 2., 3., 10.}});

   // Fill weight 1. at the coordinate 0.01, 1.02.
   hist1.Fill({0.01, 1.02});

   Experimental::TH2D hist2({{{10, 0., 1.}, {{0., 1., 2., 3., 10.}}}});
   // Fill weight 1. at the coordinate 0.01, 1.02.
   hist2.Fill({0.01, 1.02});

   Experimental::Add(hist1, hist2);

   int binidx = hist1.GetImpl()->GetBinIndex({0.01, 1.02});
   std::cout << hist1.GetImpl()->GetBinContent(binidx) << std::endl;
}