PerEntryHistogram Class Reference

Holder for information to calculate per entry histograms. More...

#include <PerEntryHistogram.hh>

Inheritance diagram for PerEntryHistogram:

Collaboration diagram for PerEntryHistogram:

Public Member Functions
	PerEntryHistogram ()
	Public constructor only for compatibility with ROOT - not intended for use.
	PerEntryHistogram (const HistogramDef *definition, TChain *chain)
	Constructor with a histogram definition and the chain to operate on.
virtual void	AccumulateCurrentEntry (long int entryNumber)
virtual void	Terminate ()
	Terminate the accumulator and save the result to the result member variable.
virtual void	Write (TDirectory *dir=nullptr)
void	AddNEmptyEntries (unsigned long i)
double	Integral () const
	Get the Integral() from the result member histogram if it exists, otherwise 0.

Protected Member Functions
	ClassDef (PerEntryHistogram, 1)

Protected Attributes
HistogramAccumulator *	accumulator
TChain *	chain
	Cache of chain pointer that provides data.
std::string	selection
	Selection command.
TH1 *	temp
	Histogram for temporary 1 event data.
TH1 *	result
	Final result with errors as the error on the mean.
std::string	command
	Draw command.

Detailed Description

Holder for information to calculate per entry histograms.

This creates a histogram per event and accumulates the mean and variance for every bin in a cloned histogram. In the case of 1 event, the bin error is 0.

This uses a HistogramAccumulator object rather than inheritance as this class has to prepare the base histogram in the constructor first.

Author

Laurie Nevay

Definition at line 46 of file PerEntryHistogram.hh.

Constructor & Destructor Documentation

PerEntryHistogram()

PerEntryHistogram::PerEntryHistogram	(	const HistogramDef *	definition,
		TChain *	chain
	)

Constructor with a histogram definition and the chain to operate on.

Definition at line 50 of file PerEntryHistogram.cc.

References command, HistogramFactory::CreateHistogram1D(), HistogramFactory::CreateHistogram2D(), HistogramFactory::CreateHistogram3D(), HistogramFactory::CreateHistogram4D(), and temp.

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~PerEntryHistogram()

PerEntryHistogram::~PerEntryHistogram ( )

virtual

Definition at line 110 of file PerEntryHistogram.cc.

Member Function Documentation

AccumulateCurrentEntry()

void PerEntryHistogram::AccumulateCurrentEntry ( long int  entryNumber )

virtual

Create a histogram of the appropriate dimensions for the currently loaded event then add it to the online (ie running) means and variances.

Reimplemented in PerEntryHistogramSet.

Definition at line 116 of file PerEntryHistogram.cc.

References HistogramAccumulator::Accumulate(), chain, command, selection, and temp.

Referenced by PerEntryHistogramSet::AccumulateCurrentEntry().

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AddNEmptyEntries()

void PerEntryHistogram::AddNEmptyEntries ( unsigned long  i )

inline

Permit the number of recorded entries to be incremented with zero values, ie just increment n.

Definition at line 70 of file PerEntryHistogram.hh.

References HistogramAccumulator::AddNEmptyEntries().

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Integral()

double PerEntryHistogram::Integral

(

)

const

Get the Integral() from the result member histogram if it exists, otherwise 0.

Definition at line 142 of file PerEntryHistogram.cc.

References result.

Terminate()

void PerEntryHistogram::Terminate ( )

virtual

Terminate the accumulator and save the result to the result member variable.

Reimplemented in PerEntryHistogramSet.

Definition at line 127 of file PerEntryHistogram.cc.

References result, and HistogramAccumulator::Terminate().

Referenced by PerEntryHistogramSet::Terminate().

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Write()

void PerEntryHistogram::Write ( TDirectory *  dir = nullptr )

virtual

Forwarding function - call Write on result histograms on the currently open file. Optional directory to specify where the histogram should be moved to.

Reimplemented in PerEntryHistogramSet.

Definition at line 132 of file PerEntryHistogram.cc.

References result.

Referenced by PerEntryHistogramSet::Write().

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Field Documentation

accumulator

HistogramAccumulator* PerEntryHistogram::accumulator

protected

Definition at line 76 of file PerEntryHistogram.hh.

chain

TChain* PerEntryHistogram::chain

protected

Cache of chain pointer that provides data.

Definition at line 77 of file PerEntryHistogram.hh.

Referenced by AccumulateCurrentEntry().

command

std::string PerEntryHistogram::command

protected

Draw command.

Definition at line 81 of file PerEntryHistogram.hh.

Referenced by AccumulateCurrentEntry(), and PerEntryHistogram().

result

TH1* PerEntryHistogram::result

protected

Final result with errors as the error on the mean.

Definition at line 80 of file PerEntryHistogram.hh.

Referenced by Integral(), Terminate(), and Write().

selection

std::string PerEntryHistogram::selection

protected

Selection command.

Definition at line 78 of file PerEntryHistogram.hh.

Referenced by AccumulateCurrentEntry().

temp

TH1* PerEntryHistogram::temp

protected

Histogram for temporary 1 event data.

Definition at line 79 of file PerEntryHistogram.hh.

Referenced by AccumulateCurrentEntry(), and PerEntryHistogram().

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The documentation for this class was generated from the following files:

• /Users/lnevay/physics/reps/bdsim/analysis/PerEntryHistogram.hh
• /Users/lnevay/physics/reps/bdsim/analysis/PerEntryHistogram.cc