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histops.cxx
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1/// \file
2/// \ingroup tutorial_v7
3///
4/// \macro_code
5///
6/// \date 2015-08-08
7/// \warning This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback
8/// is welcome!
9/// \author Axel Naumann <axel@cern.ch>
10
11/*************************************************************************
12 * Copyright (C) 1995-2015, Rene Brun and Fons Rademakers. *
13 * All rights reserved. *
14 * *
15 * For the licensing terms see $ROOTSYS/LICENSE. *
16 * For the list of contributors see $ROOTSYS/README/CREDITS. *
17 *************************************************************************/
18
19#include "ROOT/RHist.hxx"
20#include <iostream>
21
22void histops()
23{
24
25 using namespace ROOT::Experimental;
26 // Create a 2D histogram with an X axis with equidistant bins, and a y axis
27 // with irregular binning.
28 RH2D hist1({10, 0., 1.}, {{0., 1., 2., 3., 10.}});
29
30 // Fill weight 1. at the coordinate 0.01, 1.02.
31 hist1.Fill({0.01, 1.02});
32
33 RH2D hist2({{{10, 0., 1.}, {{0., 1., 2., 3., 10.}}}});
34 // Fill weight 1. at the coordinate 0.02, 1.03 (that's the same bin).
35 hist2.Fill({0.02, 1.03});
36
37 Add(hist1, hist2);
38
39 int binidx = hist1.GetImpl()->GetBinIndex({0.01, 1.02});
40 std::cout << hist1.GetImpl()->GetBinContent(binidx) << std::endl;
41}
Histogram class for histograms with DIMENSIONS dimensions, where each bin count is stored by a value ...
Definition RHist.hxx:53
void Fill(const CoordArray_t &x, Weight_t weight=(Weight_t) 1) noexcept
Add weight to the bin containing coordinate x.
Definition RHist.hxx:140
TMatrixT< Element > & Add(TMatrixT< Element > &target, Element scalar, const TMatrixT< Element > &source)
Modify addition: target += scalar * source.