ROOT   Reference Guide
rf407_latextables.C
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1/// \file
2/// \ingroup tutorial_roofit
3/// \notebook -nodraw
4///
5/// Data and categories: latex printing of lists and sets of RooArgSets
6///
7/// \macro_output
8/// \macro_code
9///
10/// \date 07/2008
11/// \author Wouter Verkerke
12
13#include "RooRealVar.h"
14#include "RooDataSet.h"
15#include "RooGaussian.h"
16#include "RooConstVar.h"
17#include "RooChebychev.h"
19#include "RooExponential.h"
20#include "TCanvas.h"
21#include "TAxis.h"
22#include "RooPlot.h"
23using namespace RooFit;
24
26{
27 // S e t u p c o m p o s i t e p d f
28 // --------------------------------------
29
30 // Declare observable x
31 RooRealVar x("x", "x", 0, 10);
32
33 // Create two Gaussian PDFs g1(x,mean1,sigma) anf g2(x,mean2,sigma) and their parameters
34 RooRealVar mean("mean", "mean of gaussians", 5);
35 RooRealVar sigma1("sigma1", "width of gaussians", 0.5);
36 RooRealVar sigma2("sigma2", "width of gaussians", 1);
37 RooGaussian sig1("sig1", "Signal component 1", x, mean, sigma1);
38 RooGaussian sig2("sig2", "Signal component 2", x, mean, sigma2);
39
40 // Sum the signal components into a composite signal p.d.f.
41 RooRealVar sig1frac("sig1frac", "fraction of component 1 in signal", 0.8, 0., 1.);
42 RooAddPdf sig("sig", "Signal", RooArgList(sig1, sig2), sig1frac);
43
44 // Build Chebychev polynomial p.d.f.
45 RooRealVar a0("a0", "a0", 0.5, 0., 1.);
46 RooRealVar a1("a1", "a1", 0.2, 0., 1.);
47 RooChebychev bkg1("bkg1", "Background 1", x, RooArgSet(a0, a1));
48
49 // Build expontential pdf
50 RooRealVar alpha("alpha", "alpha", -1);
51 RooExponential bkg2("bkg2", "Background 2", x, alpha);
52
53 // Sum the background components into a composite background p.d.f.
54 RooRealVar bkg1frac("sig1frac", "fraction of component 1 in background", 0.2, 0., 1.);
55 RooAddPdf bkg("bkg", "Signal", RooArgList(bkg1, bkg2), sig1frac);
56
57 // Sum the composite signal and background
58 RooRealVar bkgfrac("bkgfrac", "fraction of background", 0.5, 0., 1.);
59 RooAddPdf model("model", "g1+g2+a", RooArgList(bkg, sig), bkgfrac);
60
61 // M a k e l i s t o f p a r a m e t e r s b e f o r e a n d a f t e r f i t
62 // ----------------------------------------------------------------------------------------
63
64 // Make list of model parameters
65 RooArgSet *params = model.getParameters(x);
66
67 // Save snapshot of prefit parameters
68 RooArgSet *initParams = (RooArgSet *)params->snapshot();
69
70 // Do fit to data, to obtain error estimates on parameters
71 RooDataSet *data = model.generate(x, 1000);
72 model.fitTo(*data);
73
74 // P r i n t l a t ex t a b l e o f p a r a m e t e r s o f p d f
75 // --------------------------------------------------------------------------
76
77 // Print parameter list in LaTeX for (one column with names, one column with values)
78 params->printLatex();
79
80 // Print parameter list in LaTeX for (names values|names values)
81 params->printLatex(Columns(2));
82
83 // Print two parameter lists side by side (name values initvalues)
84 params->printLatex(Sibling(*initParams));
85
86 // Print two parameter lists side by side (name values initvalues|name values initvalues)
87 params->printLatex(Sibling(*initParams), Columns(2));
88
89 // Write LaTex table to file
90 params->printLatex(Sibling(*initParams), OutputFile("rf407_latextables.tex"));
91}
void printLatex(const RooCmdArg &arg1=RooCmdArg(), const RooCmdArg &arg2=RooCmdArg(), const RooCmdArg &arg3=RooCmdArg(), const RooCmdArg &arg4=RooCmdArg(), const RooCmdArg &arg5=RooCmdArg(), const RooCmdArg &arg6=RooCmdArg(), const RooCmdArg &arg7=RooCmdArg(), const RooCmdArg &arg8=RooCmdArg()) const
Output content of collection as LaTex table.
RooAddPdf is an efficient implementation of a sum of PDFs of the form.
RooArgList is a container object that can hold multiple RooAbsArg objects.
Definition: RooArgList.h:21
RooArgSet is a container object that can hold multiple RooAbsArg objects.
Definition: RooArgSet.h:28
RooArgSet * snapshot(bool deepCopy=true) const
Use RooAbsCollection::snapshot(), but return as RooArgSet.
Definition: RooArgSet.h:126
Chebychev polynomial p.d.f.
Definition: RooChebychev.h:25
RooDataSet is a container class to hold unbinned data.
Definition: RooDataSet.h:33
Exponential PDF.
Plain Gaussian p.d.f.
Definition: RooGaussian.h:25
RooRealVar represents a variable that can be changed from the outside.
Definition: RooRealVar.h:35
RooCmdArg Columns(Int_t ncol)
RooCmdArg Sibling(const RooAbsCollection &sibling)
RooCmdArg OutputFile(const char *fileName)
Double_t x[n]
Definition: legend1.C:17
The namespace RooFit contains mostly switches that change the behaviour of functions of PDFs (or othe...