rarStep Class Reference

RooParametricStepFunction PDF builder. More...

#include <rarStep.hh>

Inheritance diagram for rarStep:

List of all members.

Public Member Functions
	rarStep ()
	Trivial ctor.
	rarStep (const char *configFile, const char *configSec, const char *configStr, rarDatasets *theDatasets, RooDataSet *theData, const char *name, const char *title)
	Default ctor.
virtual	~rarStep ()
Protected Member Functions
void	init ()
	Initial function called by ctor.
Protected Attributes
RooAbsReal *	_x
	Default obs.
Int_t	_nBins
	Number of bins.
TArrayD *	_limits
	Limits of those bins.
Private Member Functions
	rarStep (const rarStep &)
	ClassDef (rarStep, 0)

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Detailed Description

RooParametricStepFunction PDF builder.

Build RooParametricStepFunction Pdf.

Config Directives:

/// configStr = Step ["<Optional Title>"]
/// x = AbsReal Def
/// nBins = <binVal>
/// limits = <<binVal>+1 points>
/// H00 = AbsReal Def
/// ...
/// H<binVal-1> = AbsReal Def

x is the default observable. nBins is the number of bins of the step function. limits is a set of <binVal>+1 Double_t's setting the bounds of those bins. H00 ... H<binVal-1> are <binVal>-1 free parameters of the step function. All the AbsReal variables can be RooRealVar or RooFormulaVar.

Definition at line 41 of file rarStep.hh.

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Constructor & Destructor Documentation

rarStep::rarStep

(

)

Trivial ctor.

Usually the objects should be created using other ctors.

Definition at line 40 of file rarStep.cc.

References init().

  : rarBasePdf(),
    _x(0), _nBins(0), _limits(0)
{
  init();
}

rarStep::rarStep	(	const char *	configFile,
		const char *	configSec,
		const char *	configStr,
		rarDatasets *	theDatasets,
		RooDataSet *	theData,
		const char *	name,
		const char *	title
	)

Default ctor.

Parameters:

	configFile	The config file
	configSec	The config section
	configStr	The config string
	theDatasets	Available datasets
	theData	Default dataset for this PDF
	name	The name
	title	The title

The default ctor first initializes data members, and then calls init.

Definition at line 59 of file rarStep.cc.

References init().

  : rarBasePdf(configFile, configSec, configStr,
               theDatasets, theData, name, title),
    _x(0), _nBins(0), _limits(0)
{
  init();
}

rarStep::~rarStep

(

)

[virtual]

Definition at line 69 of file rarStep.cc.

{
}

rarStep::rarStep

(

const rarStep &

)

[private]

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Member Function Documentation

rarStep::ClassDef	(	rarStep	,
		0
	)			[private]

void rarStep::init

(

)

[protected, virtual]

Initial function called by ctor.

init is called by the ctor. It first reads in _nBins and _limits info from its param config section, and creates H00 ... H<nBins-1> parameters by calling createAbsReal, and finally it builds RooParametricStepFunction PDF.

Reimplemented from rarBasePdf.

Definition at line 80 of file rarStep.cc.

References rarBasePdf::_coeffs, _limits, _nBins, rarBasePdf::_obsSet, rarBasePdf::_params, rarBasePdf::_pdfType, rarBasePdf::_thePdf, _x, rarConfig::createAbsReal(), rarBasePdf::getVarSec(), rarStrParser::nArgs(), and rarConfig::readConfStr().

Referenced by rarStep().

{
  cout<<"init of rarStep for "<<GetName()<<":"<<endl;
  
  // first get its dependent/observable
  _x=createAbsReal("x", "observable"); assert(_x);
  RooRealVar *x=(RooRealVar *)RooArgList(_obsSet).at(0); assert(x);
  // Config pdf params
  _nBins=atoi(readConfStr("nBins", "0", getVarSec()));
  if (_nBins<=0) _nBins= // from plotBins
    atoi(readConfStr(Form("plotBins_%s", x->GetName()),"0", getVarSec()));
  if (_nBins<=0) _nBins=x->getBins(); // get bins from its obs
  _limits= new TArrayD(_nBins+1);
  // read in limit info
  TString limitStr=readConfStr("limits", "", getVarSec());
  rarStrParser limitStrParser=limitStr;
  Int_t nLimits=limitStrParser.nArgs();
  if (_nBins+1==nLimits) {
    for (Int_t i=0; i<_nBins+1; i++) {
      (*_limits)[i]=atof(limitStrParser[i]);
    }
  } else { // set equal interval
    Double_t step=(x->getMax() - x->getMin())/_nBins;
    for (Int_t i=0; i<_nBins+1; i++) {
      (*_limits)[i]=x->getMin()+i*step;
    }
  }
  // set lo and hi limits
  //(*_limits)[0]=x->getMin();
  //(*_limits)[_nBins]=x->getMax();
  // read in coeffs
  for (Int_t i=0; i<_nBins-1; i++) {
    RooAbsReal *H=createAbsReal(Form("H%02d",i),Form("h_{%d}", i),.1,0,1000);
    _coeffs.add(*H);
  }
  _params.Print("v");
  
  // create pdf
  _thePdf=
    new RooParametricStepFunction(Form("the_%s", GetName()),
                                  _pdfType+" "+GetTitle(),
                                  *_x, _coeffs, *_limits, _nBins);
}

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Member Data Documentation

TArrayD* rarStep::_limits [protected]

Limits of those bins.

Definition at line 55 of file rarStep.hh.

Referenced by init().

Int_t rarStep::_nBins [protected]

Number of bins.

Definition at line 54 of file rarStep.hh.

Referenced by init().

RooAbsReal* rarStep::_x [protected]

Default obs.

Definition at line 53 of file rarStep.hh.

Referenced by init().

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

• rarStep.hh
• rarStep.cc

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