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hist024_THStack_pads.C
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1/// \file
2/// \ingroup tutorial_hist
3/// \notebook
4/// Drawing stack histograms on subpads.
5///
6/// In this example three histograms are displayed on separate pads.
7/// If canvas divided in advance - provided subpads will be used by the THStack.
8///
9/// \macro_image
10/// \macro_code
11///
12/// \date June 2024
13/// \author Sergey Linev
14
16{
17 auto hs = new THStack("hs", "Stacked 1D histograms");
18
19 // Create three 1-d histograms and add them in the stack
20 auto h1st = new TH1F("h1st", "test hstack 1", 100, -4, 4);
21 h1st->FillRandom("gaus", 20000);
22 hs->Add(h1st);
23
24 auto h2st = new TH1F("h2st", "test hstack 2", 100, -4, 4);
25 h2st->FillRandom("gaus", 15000);
26 hs->Add(h2st);
27
28 auto h3st = new TH1F("h3st", "test hstack 3", 100, -4, 4);
29 h3st->FillRandom("gaus", 10000);
30 hs->Add(h3st);
31
32 auto c1 = new TCanvas("c1", "THStack drawing on pads", 800, 800);
33
34 // prepare subpads for drawing of histograms
35 c1->Divide(1, 3);
36
37 // draw thstack on canvas with "pads" draw option
38 c1->Add(hs, "pads");
39}
ROOT::Detail::TRangeCast< T, true > TRangeDynCast
TRangeDynCast is an adapter class that allows the typed iteration through a TCollection.
The Canvas class.
Definition TCanvas.h:23
1-D histogram with a float per channel (see TH1 documentation)
Definition TH1.h:645
The Histogram stack class.
Definition THStack.h:40
return c1
Definition legend1.C:41