rf512_wsfactory_oper.C File Reference

Detailed Description

Organization and simultaneous fits: operator expressions and expression-based basic pdfs in the workspace factory syntax

 
#include "RooRealVar.h"
#include "RooDataSet.h"
#include "RooGaussian.h"
#include "RooChebychev.h"
#include "RooAddPdf.h"
#include "RooWorkspace.h"
#include "RooPlot.h"
#include "TCanvas.h"
#include "TAxis.h"
using namespace RooFit;
 
void rf512_wsfactory_oper()
{
   RooWorkspace *w = new RooWorkspace("w");
 
   // You can define typedefs for even shorter construction semantics
   w->factory("$Typedef(Gaussian,Gaus)");
   w->factory("$Typedef(Chebychev,Cheby)");
 
   // O p e r a t o r   p . d . f .   e x a m p l e s
   // ------------------------------------------------
 
   // PDF addition is done with SUM (coef1*pdf1,pdf2)
   w->factory("SUM::summodel( f[0,1]*Gaussian::gx(x[-10,10],m[0],1.0), Chebychev::ch(x,{0.1,0.2,-0.3}) )");
 
   // Extended PDF addition is done with SUM (yield1*pdf1,yield2*pdf2)
   w->factory("SUM::extsummodel( Nsig[0,1000]*gx, Nbkg[0,1000]*ch )");
 
   // PDF multiplication is done with PROD ( pdf1, pdf2 )
   w->factory("PROD::gxz( gx, Gaussian::gz(z[-10,10],0,1) )");
 
   // Conditional pdf multiplication is done with PROD ( pdf1|obs, pdf2 )
   w->factory("Gaussian::gy( y[-10,10], x, 1.0 )");
   w->factory("PROD::gxycond( gy|x, gx )");
 
   // Convolution (numeric/ fft) is done with NCONV/FCONV (obs,pdf1,pdf2)
   w->factory("FCONV::lxg( x, Gaussian::g(x,mg[0],1), Landau::lc(x,0,1) )");
 
   // Simultaneous pdfs are constructed with SIMUL( index, state1=pdf1, state2=pdf2,...)
   w->factory("SIMUL::smodel( c[A=0,B=1], A=Gaussian::gs(x,m,s[1.0, 0.01, 10.0]), B=Landau::ls(x,0,1) )");
 
   // O p e r a t o r   f u n c t i o n   e x a m p l e s
   // ---------------------------------------------------
 
   // Function multiplication is done with prod (func1, func2,...)
   w->factory("prod::uv(u[10],v[10])");
 
   // Function addition is done with sum(func1,func2)
   w->factory("sum::uv2(u,v)");
 
   // Lagrangian morphing function for the example shown in rf711_lagrangianmorph
   std::string infilename = std::string(gROOT->GetTutorialDir()) + "/roofit/roofit/input_histos_rf_lagrangianmorph.root";
   w->factory(("lagrangianmorph::morph($fileName('"+infilename+"'),$observableName('pTV'),$couplings({cHq3[0,1],SM[1]}),$NewPhysics(cHq3=1,SM=0),$folders({'SM_NPsq0','cHq3_NPsq1','cHq3_NPsq2'}))").c_str());
 
 
   // Taylor expansion is done with taylorexpand(func,{var1,var2,...},val,order)
   w->factory("taylorexpand::te(expr::poly('x^4+5*x^3+2*x^2+x+1',x),{x},0.0,2)");
 
 
   // I n t e r p r e t e d   a n d   c o m p i l e d   e x p r e s s i o n   b a s e d   p . d . f . s .
   // ---------------------------------------------------------------------------------------------------
 
   // Create a RooGenericPdf interpreted pdf You can use single quotes to pass the expression string argument
   w->factory("EXPR::G('x*x+1',x)");
 
   // Create a custom compiled pdf similar to the above interpreted pdf
   // The code required to make this pdf is automatically embedded in the workspace
   w->factory("CEXPR::GC('x*x+a',{x,a[1]})");
 
   // Compiled and interpreted functions (rather than pdfs) can be made with the lower case
   // 'expr' and 'cexpr' types
 
   // Print workspace contents
   w->Print();
 
   // Make workspace visible on command line
   gDirectory->Add(w);
}

[#1] INFO:Caching -- Changing internal binning of variable 'x' in FFT 'lxg' from 0 to 930 to improve the precision of the numerical FFT. This can be done manually by setting an additional binning named 'cache'.
[#0] PROGRESS:InputArguments -- initializing physics inputs from file /github/home/ROOT-CI/build/tutorials/roofit/roofit/input_histos_rf_lagrangianmorph.root with object name(s) 'pTV'
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing dataset dh_SM_NPsq0_morph
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing dataset dh_cHq3_NPsq1_morph
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing dataset dh_cHq3_NPsq2_morph
[#0] ERROR:ObjectHandling -- RooWorkspace::CodeRepo(w) ERROR: cannot retrieve code file names for class RooCFAuto000Pdf through ROOT TClass interface, unable to import code
 
RooWorkspace(w) w contents
 
variables
---------
(Nbkg,Nsig,SM,a,binWidth_pTV,c,cHq3,f,m,mg,nNP0,nNP1,nNP2,nNP3,nNP4,pTV,s,te_c0,te_c1,te_c2,te_x^0,te_x^1,te_x^2,u,v,x,y,z)
 
p.d.f.s
-------
RooGenericPdf::G[ actualVars=(x) formula="x[0]*x[0]+1" ] = 1
RooCFAuto000Pdf::GC[ x=x a=a ] = 1
RooChebychev::ch[ x=x coefList=(0.1,0.2,-0.3) ] = 0.8
RooAddPdf::extsummodel[ Nsig * gx + Nbkg * ch ] = 0.9/1
RooGaussian::g[ x=x mean=mg sigma=1 ] = 1
RooGaussian::gs[ x=x mean=m sigma=s ] = 1
RooGaussian::gx[ x=x mean=m sigma=1 ] = 1
RooProdPdf::gxycond[ gx * gy|x ] = 1
RooProdPdf::gxz[ gx * gz ] = 1
RooGaussian::gy[ x=y mean=x sigma=1 ] = 1
RooGaussian::gz[ x=z mean=0 sigma=1 ] = 1
RooLandau::lc[ x=x mean=0 sigma=1 ] = 0.178854
RooLandau::ls[ x=x mean=0 sigma=1 ] = 0.178854
RooFFTConvPdf::lxg[ g(x) (*) lc(x) ] = 380336
RooSimultaneous::smodel[ indexCat=c A=gs B=ls ] = 1
RooAddPdf::summodel[ f * gx + [%] * ch ] = 0.9/1
 
functions
--------
RooLagrangianMorphFunc::morph[ physics=(phys_SM_NPsq0_morph,phys_cHq3_NPsq1_morph,phys_cHq3_NPsq2_morph) operators=(cHq3,SM) observables=(pTV) binWidths=(binWidth_pTV) flags=(nNP0,nNP1,nNP2,nNP3,nNP4) binWidth_pTV * SM_NPsq0_morph + binWidth_pTV * cHq3_NPsq1_morph + binWidth_pTV * cHq3_NPsq2_morph ] = 35.9835
RooHistFunc::phys_SM_NPsq0_morph[ depList=(pTV) ] = 65.1309
RooHistFunc::phys_cHq3_NPsq1_morph[ depList=(pTV) ] = 544.966
RooHistFunc::phys_cHq3_NPsq2_morph[ depList=(pTV) ] = 1528.22
RooFormulaVar::poly[ actualVars=(x) formula="x^4+5*x^3+2*x^2+x+1" ] = 1
RooPolyFunc::te[ vars=(x) te_t0=(te_x^0,te_c0) te_t1=(te_x^1,te_c1) te_t2=(te_x^2,te_c2) ] = 1
RooProduct::uv[ u * v ] = 100
RooAddition::uv2[ u + v ] = 20
 
embedded datasets (in pdfs and functions)
-----------------------------------------
RooDataHist::dh_SM_NPsq0_morph(pTV)
RooDataHist::dh_cHq3_NPsq1_morph(pTV)
RooDataHist::dh_cHq3_NPsq2_morph(pTV)
 

Date

July 2009

Author

Wouter Verkerke

Definition in file rf512_wsfactory_oper.C.