rf503_wspaceread.C File Reference

Detailed Description

Organisation and simultaneous fits: reading and using a workspace

The input file for this macro is generated by rf502_wspacewrite.C

 
 
␛[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
 
0x55c9439656a0 RooAddPdf::model = 0.9 [Auto,Dirty] 
  0x55c943bf9f80/V- RooChebychev::bkg = 0.8 [Auto,Dirty] 
    0x55c9416ad460/V- RooRealVar::x = 5
    0x55c943c8f310/V- RooRealVar::a0 = 0.5
    0x55c943c8fb20/V- RooRealVar::a1 = 0.2
  0x55c943c90780/V- RooRealVar::bkgfrac = 0.5
  0x55c943c83e90/V- RooAddPdf::sig = 1 [Auto,Dirty] 
    0x55c943c1e370/V- RooGaussian::sig1 = 1 [Auto,Dirty] 
      0x55c9416ad460/V- RooRealVar::x = 5
      0x55c943c272a0/V- RooRealVar::mean = 5
      0x55c943c8e2f0/V- RooRealVar::sigma1 = 0.5
    0x55c943c84b50/V- RooRealVar::sig1frac = 0.8
    0x55c943c27750/V- RooGaussian::sig2 = 1 [Auto,Dirty] 
      0x55c9416ad460/V- RooRealVar::x = 5
      0x55c943c272a0/V- RooRealVar::mean = 5
      0x55c943c27f20/V- RooRealVar::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: ()
[#1] INFO:Plotting -- RooAbsPdf::plotOn(model) directly selected PDF components: (bkg,sig2)
[#1] INFO:Plotting -- RooAbsPdf::plotOn(model) indirectly selected PDF components: (sig)

 
#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 rf503_wspaceread()
{
   // R e a d   w o r k s p a c e   f r o m   f i l e
   // -----------------------------------------------
 
   // Open input file with workspace (generated by rf14_wspacewrite)
   TFile *f = new TFile("rf502_workspace.root");
 
   // Retrieve workspace from file
   RooWorkspace *w = (RooWorkspace *)f->Get("w");
 
   // R e t r i e v e   p d f ,   d a t a   f r o m   w o r k s p a c e
   // -----------------------------------------------------------------
 
   // Retrieve x,model and data from workspace
   RooRealVar *x = w->var("x");
   RooAbsPdf *model = w->pdf("model");
   RooAbsData *data = w->data("modelData");
 
   // Print structure of composite pdf
   model->Print("t");
 
   // F i t   m o d e l   t o   d a t a ,   p l o t   m o d e l
   // ---------------------------------------------------------
 
   // Fit model to data
   model->fitTo(*data);
 
   // Plot data and PDF overlaid
   RooPlot *xframe = x->frame(Title("Model and data read from workspace"));
   data->plotOn(xframe);
   model->plotOn(xframe);
 
   // Overlay the background component of model with a dashed line
   model->plotOn(xframe, Components("bkg"), LineStyle(kDashed));
 
   // Overlay the background+sig2 components of model with a dotted line
   model->plotOn(xframe, Components("bkg,sig2"), LineStyle(kDotted));
 
   // Draw the frame on the canvas
   new TCanvas("rf503_wspaceread", "rf503_wspaceread", 600, 600);
   gPad->SetLeftMargin(0.15);
   xframe->GetYaxis()->SetTitleOffset(1.4);
   xframe->Draw();
}

Date

July 2008

Author

Wouter Verkerke

Definition in file rf503_wspaceread.C.