rf407_latextables.C

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/// \file
/// \ingroup tutorial_roofit
/// \notebook -nodraw
/// Data and categories: latex printing of lists and sets of RooArgSets
///
/// \macro_code
/// \macro_output
///
/// \date July 2008
/// \author Wouter Verkerke
 
#include "RooRealVar.h"
#include "RooDataSet.h"
#include "RooGaussian.h"
#include "RooChebychev.h"
#include "RooAddPdf.h"
#include "RooExponential.h"
#include "TCanvas.h"
#include "TAxis.h"
#include "RooPlot.h"
using namespace RooFit;
 
void rf407_latextables()
{
   // S e t u p   c o m p o s i t e    p d f
   // --------------------------------------
 
   // Declare observable x
   RooRealVar x("x", "x", 0, 10);
 
   // Create two Gaussian PDFs g1(x,mean1,sigma) anf g2(x,mean2,sigma) and their parameters
   RooRealVar mean("mean", "mean of gaussians", 5);
   RooRealVar sigma1("sigma1", "width of gaussians", 0.5);
   RooRealVar sigma2("sigma2", "width of gaussians", 1);
   RooGaussian sig1("sig1", "Signal component 1", x, mean, sigma1);
   RooGaussian sig2("sig2", "Signal component 2", x, mean, sigma2);
 
   // Sum the signal components into a composite signal pdf
   RooRealVar sig1frac("sig1frac", "fraction of component 1 in signal", 0.8, 0., 1.);
   RooAddPdf sig("sig", "Signal", RooArgList(sig1, sig2), sig1frac);
 
   // Build Chebychev polynomial pdf
   RooRealVar a0("a0", "a0", 0.5, 0., 1.);
   RooRealVar a1("a1", "a1", 0.2, 0., 1.);
   RooChebychev bkg1("bkg1", "Background 1", x, RooArgSet(a0, a1));
 
   // Build expontential pdf
   RooRealVar alpha("alpha", "alpha", -1);
   RooExponential bkg2("bkg2", "Background 2", x, alpha);
 
   // Sum the background components into a composite background pdf
   RooRealVar bkg1frac("sig1frac", "fraction of component 1 in background", 0.2, 0., 1.);
   RooAddPdf bkg("bkg", "Signal", RooArgList(bkg1, bkg2), sig1frac);
 
   // Sum the composite signal and background
   RooRealVar bkgfrac("bkgfrac", "fraction of background", 0.5, 0., 1.);
   RooAddPdf model("model", "g1+g2+a", RooArgList(bkg, sig), bkgfrac);
 
   // 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
   // ----------------------------------------------------------------------------------------
 
   // Make list of model parameters
   std::unique_ptr<RooArgSet> params{model.getParameters(x)};
 
   // Save snapshot of prefit parameters
   std::unique_ptr<RooArgSet> initParams{static_cast<RooArgSet *>(params->snapshot())};
 
   // Do fit to data, to obtain error estimates on parameters
   std::unique_ptr<RooDataSet> data{model.generate(x, 1000)};
   model.fitTo(*data, PrintLevel(-1));
 
   // 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
   // --------------------------------------------------------------------------
 
   // Print parameter list in LaTeX for (one column with names, one column with values)
   params->printLatex();
 
   // Print parameter list in LaTeX for (names values|names values)
   params->printLatex(Columns(2));
 
   // Print two parameter lists side by side (name values initvalues)
   params->printLatex(Sibling(*initParams));
 
   // Print two parameter lists side by side (name values initvalues|name values initvalues)
   params->printLatex(Sibling(*initParams), Columns(2));
 
   // Write LaTex table to file
   params->printLatex(Sibling(*initParams), OutputFile("rf407_latextables.tex"));
}