LMU/musrfit
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(1) added cleaninstall to Makefile.PMusr, (2) some minor changes in PMusrCanvas (towards showing difference between data and theory), (3) a very experimental inital guess of N0's for single histogram fits which should help minuit

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nemu
2008-08-20 12:20:18 +00:00
parent d4ee3197af
commit b48ec8515e
4 changed files with 33 additions and 0 deletions
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13
src/classes/PRunSingleHisto.cpp
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@ -455,6 +455,19 @@ bool PRunSingleHisto::PrepareFitData()
}
}
// crude estimate of the initial N0 (experimental), the idea is that the integral
// over N(t) would be N0 tau if there would be no asymmetry and bkg
value = 0.0;
for (unsigned i=start; i<runData->fDataBin[histoNo].size(); i++) {
value += runData->fDataBin[histoNo][i];
}
// the factor 0.8 takes into account bkg and asymmetry uncertainties
value = value*fTimeResolution/PMUON_LIFETIME*0.8;
cout << endl << ">> histoNo = " << histoNo << ", NormParamNo = " << fRunInfo->fNormParamNo << ", N0 estimate = " << value;
// only update parameter list if fRunInfo->fNormParamNo is a parameter and not a function
if (fRunInfo->fNormParamNo < (int)fMsrInfo->GetNoOfParams())
fMsrInfo->SetMsrParamValue(fRunInfo->fNormParamNo, value);
// count the number of bins to be fitted
fNoOfFitBins=0;
double time;