/data/refman/pasoursint/CMSSW_4_4_5_patch3/src/CommonTools/Statistics/interface/ChiSquaredProbability.h File Reference

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Functions
float	ChiSquaredProbability (double chiSquared, double nrDOF)
float	LnChiSquaredProbability (double chiSquared, double nrDOF)

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Function Documentation

float ChiSquaredProbability	(	double	chiSquared,
		double	nrDOF
	)

Returns the probability that an observation, correctly described by a model with nrDOF, will give rise to a chi-squared larger than the one observed; from this, one can interpret this probability as how likely it is to observe as high (or higher) a chi-squared. source: Numerical Recipes

Definition at line 13 of file ChiSquaredProbability.cc.

References IncompleteGammaComplement::value().

Referenced by PrimaryVertexAnalyzer::analyze(), TkConvValidator::analyze(), PhotonValidator::analyze(), PhotonAnalyzer::analyze(), PrimaryVertexAnalyzer4PU::analyzeVertexCollection(), ConversionProducer::buildCollection(), ConfigurableTrimmedVertexFinder::clean(), egammaisolation::EgammaTrackExtractor::deposit(), CSCOfflineMonitor::doSegments(), CSCValidation::doSegments(), VertexFitterResult::fill(), MuonTrackAnalyzer::fillPlots(), recoBSVTagInfoValidationAnalyzer::fillRecoToSim(), SVTagInfoValidationAnalyzer::fillRecoToSim(), recoBSVTagInfoValidationAnalyzer::fillSimToReco(), SVTagInfoValidationAnalyzer::fillSimToReco(), CSCSegAlgoTC::isSegmentGood(), egammaisolation::EgammaTrackSelector::operator()(), ChiSquared::probability(), ConversionTrackMerger::produce(), PFConversionProducer::produce(), CSCSegAlgoST::prune_bad_hits(), CSCSegAlgoHitPruning::pruneBadHits(), ConversionVertexFinder::run(), CSCSegAlgoTC::segmentSort(), TrimmedVertexFinder::theWorst(), and PrimaryVertexMonitor::vertexPlots().

{ return IncompleteGammaComplement::value( nrDOF / 2 , chiSquared / 2 ); }

float LnChiSquaredProbability	(	double	chiSquared,
		double	nrDOF
	)

Definition at line 16 of file ChiSquaredProbability.cc.

References IncompleteGammaComplement::ln().

Referenced by ChiSquared::lnProbability(), GlobalTrajectoryBuilderBase::trackProbability(), and GlobalTrackQualityProducer::trackProbability().

{ return IncompleteGammaComplement::ln( nrDOF / 2 , chiSquared / 2 ); }