adding a MINUIT <-> MINUIT2 fit compare
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src/tests/fitCompare/09042.dat
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63083
src/tests/fitCompare/09042.dat
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src/tests/fitCompare/09042.msr
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src/tests/fitCompare/09042.msr
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09042 - test
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###############################################################
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FITPARAMETER
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# No Name Value Step Pos_Error Boundaries
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1 AsymT 0.2089 -0.0033 0.0033 0 0.33
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2 Field 200.027 -0.092 0.091
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3 RateT 0.0913 -0.0076 0.0077 0 none
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4 N0 255.90 -0.40 0.40
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5 PhaseL 3.73 -0.90 0.91
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6 BkgL 5.028 -0.042 0.042
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###############################################################
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THEORY
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asymmetry 1
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simplExpo 3 (rate)
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TFieldCos 5 fun1 (phase frequency)
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###############################################################
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FUNCTIONS
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fun1 = par2 * gamma_mu
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###############################################################
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RUN 09042 MUE4 PSI MUSR-ROOT (name beamline institute data-file-format)
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fittype 0 (single histogram fit)
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norm 4
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backgr.fit 6
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lifetimecorrection
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map 0 0 0 0 0 0 0 0 0 0
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forward 1
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data 3519 63000
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t0 3519.0
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fit 0 12
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packing 50
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###############################################################
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COMMANDS
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STRATEGY 2
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MINIMIZE
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MINOS
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SAVE
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###############################################################
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FOURIER
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units Gauss # units either 'Gauss', 'MHz', or 'Mc/s'
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#fourier_power 10
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apodization STRONG # NONE, WEAK, MEDIUM, STRONG
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plot REAL # REAL, IMAG, REAL_AND_IMAG, POWER, PHASE
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dc-corrected true
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phase par6
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###############################################################
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PLOT 0 (single histo plot)
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runs 1
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range 0 10 -0.25 0.25
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#view_packing 50
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###############################################################
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STATISTIC --- 2013-11-06 09:49:19
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chisq = 1114.7, NDF = 1183, chisq/NDF = 0.942283
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BIN
src/tests/fitCompare/09042.root
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BIN
src/tests/fitCompare/09042.root
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Binary file not shown.
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src/tests/fitCompare/fitTest.C
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src/tests/fitCompare/fitTest.C
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/*******************************************************************
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fitTest.C
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author: Andreas Suter
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e-mail: andreas.suter@psi.ch
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$Id$
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********************************************************************/
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#include <iostream>
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#include <TF1.h>
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#include <TH1.h>
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#include <TVirtualFitter.h>
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#include <TCanvas.h>
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#include <TMath.h>
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const double gGammaMu = TMath::TwoPi()*0.01355;
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const double gTauMu = 2.19705; // in (us)
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TF1 *gFitFcn;
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//------------------------------------------------------------------
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/**
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* <p>Background (flat for the moment)
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*
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* \param x
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* \param par par[0] is the background
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*/
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Double_t Background(Double_t *x, Double_t *par)
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{
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return par[0];
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}
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//------------------------------------------------------------------
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/**
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* <p>Asymmetry
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*
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* \param x
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* \param par par[0] = asymmetry
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* par[1] = lambda
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* par[2] = B
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* par[3] = phase
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*/
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Double_t Asymmetry(Double_t *x, Double_t *par)
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{
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return par[0]*TMath::Exp(-par[1]*x[0])*TMath::Cos(gGammaMu*par[2]*x[0]+par[3]/180.0*TMath::Pi());
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}
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//------------------------------------------------------------------
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/**
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* <p>Spectrum
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*
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* \param x
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* \param par
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*/
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Double_t Spectrum(Double_t *x, Double_t *par)
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{
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return par[0]*TMath::Exp(-x[0]/gTauMu)*(1.0 + Asymmetry(x,&par[1])) + Background(x,&par[5]);
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}
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//------------------------------------------------------------------
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/**
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* <p>fitTest
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*
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*/
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void fitTest(const char *fln, const char *fitter)
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{
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TH1::AddDirectory(kFALSE);
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TCanvas *c1 = new TCanvas("c1","Fitting Test",10,10,500,500);
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// create a TF1 with the range from 0.0 to 12.0 and 6 parameters
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gFitFcn = new TF1("gFitFcn", Spectrum, 0.0, 12.0, 6);
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gFitFcn->SetNpx(63082);
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// set parameters
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gFitFcn->SetParNames("N0", "asym", "lambda", "B", "phase", "Bkg");
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gFitFcn->SetParameter(0, 30.0); // N0
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// gFitFcn->SetParLimits(0, 0.0, 1.0e6);
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gFitFcn->SetParameter(1, 0.26); // asym
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// gFitFcn->SetParLimits(1, 0.0, 0.33);
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gFitFcn->SetParameter(2, 0.3); // lambda
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// gFitFcn->SetParLimits(2, 0.0, 100.0);
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gFitFcn->SetParameter(3, 100.0); // B
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// gFitFcn->SetParLimits(3, 0.0, 1000.0);
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gFitFcn->SetParameter(4, 0.0); // phase
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// gFitFcn->SetParLimits(4, -90.0, 90.0);
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gFitFcn->SetParameter(5, 5.0); // Bkg
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// gFitFcn->SetParLimits(5, 0.0, 1000.0);
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cout << endl << "gFitFcn->Integral(0.0, 12.0) = " << gFitFcn->Integral(0.0, 12.0);
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cout << endl;
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// read data
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ifstream ifs(fln, ifstream::in);
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char line[256];
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TObjArray *tok;
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TObjString *ostr;
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TString str;
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Int_t lineNo = 0;
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Double_t dval;
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Double_t data[63082];
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while (ifs.good()) {
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ifs.getline(line, 256);
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if (line[0]=='%') continue;
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str = line;
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if (str.Length() == 0) break;
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tok = str.Tokenize("\t");
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ostr = (TObjString*)tok->At(1);
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str = ostr->GetString();
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dval = str.Atof();
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data[lineNo++] = dval;
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if (tok) delete tok;
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}
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ifs.close();
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// fill histo
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TH1F *histo = new TH1F("histo","Minuit Test",63083,-0.00009765625,12.32080078125);
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for (Int_t i=1; i<63083; i++)
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histo->SetBinContent(i,data[i]);
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histo->Rebin(50);
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histo->Draw();
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gFitFcn->SetParameter(0, 10000.0); // N0
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gFitFcn->SetParameter(1, 0.2); // asym
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gFitFcn->SetParameter(2, 0.11); // lambda
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gFitFcn->SetParameter(3, 200.0); // B
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gFitFcn->SetParameter(4, 6.0); // phase
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gFitFcn->SetParameter(5, 300.0); // Bkg
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ROOT::Math::MinimizerOptions::SetDefaultStrategy(2);
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// ROOT::Math::MinimizerOptions::SetDefaultPrintLevel(1);
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if (!strcmp(fitter, "Minuit2"))
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TVirtualFitter::SetDefaultFitter("Minuit2");
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else
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TVirtualFitter::SetDefaultFitter("Minuit");
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histo->Fit("gFitFcn", ""); // L->likleyhood, E->minos
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histo->Fit("gFitFcn", "ME"); // L->likleyhood, E->minos
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}
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@ -78,17 +78,17 @@ void minuit2test()
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// set parameters
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gFitFcn->SetParNames("N0", "asym", "lambda", "B", "phase", "Bkg");
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gFitFcn->SetParameter(0, 30.0); // N0
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gFitFcn->SetParLimits(0, 0.0, 1.0e6);
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// gFitFcn->SetParLimits(0, 0.0, 1.0e6);
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gFitFcn->SetParameter(1, 0.26); // asym
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gFitFcn->SetParLimits(1, 0.0, 0.33);
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// gFitFcn->SetParLimits(1, 0.0, 0.33);
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gFitFcn->SetParameter(2, 0.3); // lambda
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gFitFcn->SetParLimits(2, 0.0, 100.0);
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// gFitFcn->SetParLimits(2, 0.0, 100.0);
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gFitFcn->SetParameter(3, 100.0); // B
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gFitFcn->SetParLimits(3, 0.0, 1000.0);
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// gFitFcn->SetParLimits(3, 0.0, 1000.0);
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gFitFcn->SetParameter(4, 0.0); // phase
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gFitFcn->SetParLimits(4, -90.0, 90.0);
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// gFitFcn->SetParLimits(4, -90.0, 90.0);
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gFitFcn->SetParameter(5, 5.0); // Bkg
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gFitFcn->SetParLimits(5, 0.0, 1000.0);
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// gFitFcn->SetParLimits(5, 0.0, 1000.0);
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cout << endl << "gFitFcn->Integral(0.0, 12.0) = " << gFitFcn->Integral(0.0, 12.0);
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cout << endl;
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@ -103,10 +103,11 @@ void minuit2test()
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gFitFcn->SetParameter(0, 1000.0); // N0
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gFitFcn->SetParameter(1, 0.1); // asym
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gFitFcn->SetParameter(2, 1.0); // lambda
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gFitFcn->SetParameter(3, 50.0); // B
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gFitFcn->SetParameter(3, 100.0); // B
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gFitFcn->SetParameter(4, 0.0); // phase
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gFitFcn->SetParameter(5, 300.0); // Bkg
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TVirtualFitter::SetDefaultFitter("Minuit2");
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histo->Fit("gFitFcn", ""); // L->likleyhood, E->minos
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histo->Fit("gFitFcn", ""); // L->likleyhood, E->minos
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histo->Fit("gFitFcn", "ME"); // L->likleyhood, E->minos
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}
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