rf509_wsinteractive.C File Reference

Detailed Description

'ORGANIZATION AND SIMULTANEOUS FITS' RooFit tutorial macro #509

Easy CINT interactive access to workspace contents through a 'C++' namespace in CINT that maps the workspace contents in a typesafe way

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*** NB: This macro exploits a feature native to CINT and cannot be compiled ***

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␛[1mRooFit v3.60 -- Developed by Wouter Verkerke and David Kirkby␛[0m 
                Copyright (C) 2000-2013 NIKHEF, University of California & Stanford University
                All rights reserved, please read http://roofit.sourceforge.net/license.txt
 
[#1] INFO:ObjectHandling -- RooWorkspace::exportToCint(w) INFO: references to all objects in this workspace will be created in CINT in 'namespace w'
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooAddPdf::model
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooChebychev::bkg
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::x
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::a0
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::a1
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::bkgfrac
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooAddPdf::sig
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooGaussian::sig1
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::mean
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::sigma1
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::sig1frac
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooGaussian::sig2
[#1] INFO:ObjectHandling -- RooWorkspace::import(w) importing RooRealVar::sigma2
 
RooWorkspace(w) w contents
 
variables
---------
(a0,a1,bkgfrac,mean,sig1frac,sigma1,sigma2,x)
 
p.d.f.s
-------
RooChebychev::bkg[ x=x coefList=(a0,a1) ] = 0.8
RooAddPdf::model[ bkgfrac * bkg + [%] * sig ] = 0.9
RooAddPdf::sig[ sig1frac * sig1 + [%] * sig2 ] = 1
RooGaussian::sig1[ x=x mean=mean sigma=sigma1 ] = 1
RooGaussian::sig2[ x=x mean=mean sigma=sigma2 ] = 1
 
[#1] INFO:Minization -- createNLL: caching constraint set under name CONSTR_OF_PDF_model_FOR_OBS_x with 0 entries
[#1] INFO:Minization -- RooMinimizer::optimizeConst: activating const optimization
[#1] INFO:Minization --  The following expressions will be evaluated in cache-and-track mode: (bkg,sig1,sig2)
 **********
 **    1 **SET PRINT           1
 **********
 **********
 **    2 **SET NOGRAD
 **********
 PARAMETER DEFINITIONS:
    NO.   NAME         VALUE      STEP SIZE      LIMITS
     1 a0           5.00000e-01  1.00000e-01    0.00000e+00  1.00000e+00
     2 a1           2.00000e-01  1.00000e-01    0.00000e+00  1.00000e+00
     3 bkgfrac      5.00000e-01  1.00000e-01    0.00000e+00  1.00000e+00
     4 mean         5.00000e+00  1.00000e+00    0.00000e+00  1.00000e+01
     5 sig1frac     8.00000e-01  1.00000e-01    0.00000e+00  1.00000e+00
 **********
 **    3 **SET ERR         0.5
 **********
 **********
 **    4 **SET PRINT           1
 **********
 **********
 **    5 **SET STR           1
 **********
 NOW USING STRATEGY  1: TRY TO BALANCE SPEED AGAINST RELIABILITY
 **********
 **    6 **MIGRAD        2500           1
 **********
 FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
 START MIGRAD MINIMIZATION.  STRATEGY  1.  CONVERGENCE WHEN EDM .LT. 1.00e-03
 FCN=1962.68 FROM MIGRAD    STATUS=INITIATE       14 CALLS          15 TOTAL
                     EDM= unknown      STRATEGY= 1      NO ERROR MATRIX       
  EXT PARAMETER               CURRENT GUESS       STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a0           5.00000e-01   1.00000e-01   2.01358e-01   5.55984e+00
   2  a1           2.00000e-01   1.00000e-01   2.57889e-01  -1.57464e+00
   3  bkgfrac      5.00000e-01   1.00000e-01   2.01358e-01   1.16417e+00
   4  mean         5.00000e+00   1.00000e+00   2.01358e-01  -6.91026e+01
   5  sig1frac     8.00000e-01   1.00000e-01   2.57889e-01  -2.02114e+00
                               ERR DEF= 0.5
 MIGRAD MINIMIZATION HAS CONVERGED.
 MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=1962.14 FROM MIGRAD    STATUS=CONVERGED      92 CALLS          93 TOTAL
                     EDM=0.000129539    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                   STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a0           4.38576e-01   7.35996e-02   4.50487e-03   3.73392e-02
   2  a1           2.02416e-01   1.18128e-01   5.73699e-03   4.39091e-02
   3  bkgfrac      5.03388e-01   3.60691e-02   1.24369e-03   4.03363e-02
   4  mean         5.01610e+00   3.15061e-02   1.91674e-04   7.40455e-01
   5  sig1frac     8.35115e-01   1.17067e-01   5.93647e-03   2.37022e-02
                               ERR DEF= 0.5
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  5    ERR DEF=0.5
  5.457e-03  1.116e-03 -2.768e-04 -2.327e-04 -9.105e-04 
  1.116e-03  1.438e-02 -3.249e-03  5.690e-05 -9.716e-03 
 -2.768e-04 -3.249e-03  1.303e-03 -5.364e-05  3.285e-03 
 -2.327e-04  5.690e-05 -5.364e-05  9.926e-04 -1.964e-04 
 -9.105e-04 -9.716e-03  3.285e-03 -1.964e-04  1.419e-02 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2      3      4      5
        1  0.16490   1.000  0.126 -0.104 -0.100 -0.103
        2  0.77006   0.126  1.000 -0.751  0.015 -0.680
        3  0.82650  -0.104 -0.751  1.000 -0.047  0.764
        4  0.12324  -0.100  0.015 -0.047  1.000 -0.052
        5  0.78139  -0.103 -0.680  0.764 -0.052  1.000
 **********
 **    7 **SET ERR         0.5
 **********
 **********
 **    8 **SET PRINT           1
 **********
 **********
 **    9 **HESSE        2500
 **********
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=1962.14 FROM HESSE     STATUS=OK             31 CALLS         124 TOTAL
                     EDM=0.000129401    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                INTERNAL      INTERNAL  
  NO.   NAME      VALUE            ERROR       STEP SIZE       VALUE   
   1  a0           4.38576e-01   7.35914e-02   9.00974e-04  -1.23159e-01
   2  a1           2.02416e-01   1.17686e-01   1.14740e-03  -6.37473e-01
   3  bkgfrac      5.03388e-01   3.59545e-02   2.48738e-04   6.77613e-03
   4  mean         5.01610e+00   3.15052e-02   3.83348e-05   3.22075e-03
   5  sig1frac     8.35115e-01   1.16789e-01   1.18729e-03   7.34520e-01
                               ERR DEF= 0.5
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  5    ERR DEF=0.5
  5.456e-03  1.105e-03 -2.735e-04 -2.327e-04 -9.006e-04 
  1.105e-03  1.427e-02 -3.217e-03  5.664e-05 -9.623e-03 
 -2.735e-04 -3.217e-03  1.295e-03 -5.354e-05  3.261e-03 
 -2.327e-04  5.664e-05 -5.354e-05  9.926e-04 -1.946e-04 
 -9.006e-04 -9.623e-03  3.261e-03 -1.946e-04  1.412e-02 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2      3      4      5
        1  0.16425   1.000  0.125 -0.103 -0.100 -0.103
        2  0.76801   0.125  1.000 -0.748  0.015 -0.678
        3  0.82527  -0.103 -0.748  1.000 -0.047  0.763
        4  0.12301  -0.100  0.015 -0.047  1.000 -0.052
        5  0.78016  -0.103 -0.678  0.763 -0.052  1.000
[#1] INFO:Minization -- RooMinimizer::optimizeConst: deactivating const optimization
[#1] INFO:Plotting -- RooAbsPdf::plotOn(model) directly selected PDF components: (bkg)
[#1] INFO:Plotting -- RooAbsPdf::plotOn(model) indirectly selected PDF components: ()

 
 
#include "RooRealVar.h"
#include "RooDataSet.h"
#include "RooGaussian.h"
#include "RooConstVar.h"
#include "RooChebychev.h"
#include "RooAddPdf.h"
#include "RooWorkspace.h"
#include "RooPlot.h"
#include "TCanvas.h"
#include "TAxis.h"
#include "TFile.h"
#include "TH1.h"
using namespace RooFit ;
 
 
void fillWorkspace(RooWorkspace& w) ;
 
void rf509_wsinteractive()
{
   // C r e a t e  a n d   f i l l   w o r k s p a c e
   // ------------------------------------------------
 
   // Create a workspace named 'w'
   // With CINT w could exports its contents to
   // a same-name C++ namespace in CINT 'namespace w'.
   // but this does not work anymore in CLING.
   // so this tutorial is an example on how to
   // change the code
   RooWorkspace* w1 = new RooWorkspace("w",kTRUE) ;
 
   // Fill workspace with p.d.f. and data in a separate function
   fillWorkspace(*w1) ;
 
   // Print workspace contents
   w1->Print() ;
 
   // this does not work anymore with CLING
   // use normal workspace functionality
 
 
   // U s e   w o r k s p a c e   c o n t e n t s
   // ----------------------------------------------
 
 
   // Old syntax to use the name space prefix operator to access the workspace contents
   //
   //RooDataSet* d = w::model.generate(w::x,1000) ;
   //RooFitResult* r = w::model.fitTo(*d) ;
 
   // use normal workspace methods
   RooAbsPdf * model = w1->pdf("model");
   RooRealVar * x = w1->var("x");
 
   RooDataSet* d = model->generate(*x,1000) ;
   RooFitResult* r = model->fitTo(*d) ;
 
   // old syntax to access the variable x
   // RooPlot* frame = w::x.frame() ;
 
   RooPlot* frame = x->frame() ;
   d->plotOn(frame) ;
 
   // OLD syntax to omit x::
   // NB: The 'w::' prefix can be omitted if namespace w is imported in local namespace
   // in the usual C++ way
   //
   // using namespace w;
   // model.plotOn(frame) ;
   // model.plotOn(frame,Components(bkg),LineStyle(kDashed)) ;
 
   // new correct syntax
   RooAbsPdf *bkg = w1->pdf("bkg");
   model->plotOn(frame);
   model->plotOn(frame,Components(*bkg),LineStyle(kDashed)) ;
 
   // Draw the frame on the canvas
   new TCanvas("rf509_wsinteractive","rf509_wsinteractive",600,600) ;
   gPad->SetLeftMargin(0.15) ; frame->GetYaxis()->SetTitleOffset(1.4) ; frame->Draw() ;
 
 
}
 
 
 
 
void fillWorkspace(RooWorkspace& w)
{
   // C r e a t e  p d f   a n d   f i l l   w o r k s p a c e
   // --------------------------------------------------------
 
   // 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",5,0,10) ;
   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) ;
 
   // Build Chebychev polynomial p.d.f.
   RooRealVar a0("a0","a0",0.5,0.,1.) ;
   RooRealVar a1("a1","a1",0.2,0.,1.) ;
   RooChebychev bkg("bkg","Background",x,RooArgSet(a0,a1)) ;
 
   // 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) ;
 
   // 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) ;
 
   w.import(model) ;
 
}

Author

04/2009 - Wouter Verkerke

Definition in file rf509_wsinteractive.C.