rf407_latextables.C

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/// \file
/// \ingroup tutorial_roofit
/// \notebook -nodraw
///  'DATA AND CATEGORIES' RooFit tutorial macro #407
///
///  Latex printing of lists and sets of RooArgSets
///
/// \macro_output
/// \macro_code
/// \author 07/2008 - Wouter Verkerke 
 
#include "RooRealVar.h"
#include "RooDataSet.h"
#include "RooGaussian.h"
#include "RooConstVar.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 p.d.f.
   RooRealVar sig1frac("sig1frac","fraction of component 1 in signal",0.8,0.,1.) ;
   RooAddPdf sig("sig","Signal",RooArgList(sig1,sig2),sig1frac) ;
 
   // Build Chebychev polynomial p.d.f.  
   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 p.d.f.
   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
   RooArgSet* params = model.getParameters(x) ;
 
   // Save snapshot of prefit parameters
   RooArgSet* initParams = (RooArgSet*) params->snapshot() ;
 
   // Do fit to data, to obtain error estimates on parameters
   RooDataSet* data = model.generate(x,1000) ;
   model.fitTo(*data) ;
 
 
 
   // 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")) ;
 
 
}