Gaudi::Axis Class Reference

An IAxis represents a binned histogram axis. More...

#include <Axis.h>

Collaboration diagram for Gaudi::Axis:

[legend]

List of all members.

Public Types
typedef Axis	self
Public Member Functions
int	rIndex (int index) const
	Convert a AIDA bin number on the axis to the ROOT bin number.
int	aIndex (int index) const
	Convert a ROOT bin number on the axis to the AIDA bin number.
	Axis ()
	Axis (TAxis *itaxi)
void	initialize (TAxis *itaxi, bool)
virtual	~Axis ()
	Destructor.
virtual bool	isFixedBinning () const
	Check if the IAxis has fixed binning, i.e.
virtual double	lowerEdge () const
	Get the lower edge of the IAxis.
virtual double	upperEdge () const
	Get the upper edge of the IAxis.
virtual int	bins () const
	The number of bins (excluding underflow and overflow) on the IAxis.
virtual double	binLowerEdge (int index) const
	Get the lower edge of the specified bin.
virtual double	binUpperEdge (int index) const
	Get the upper edge of the specified bin.
virtual double	binWidth (int index) const
	Get the width of the specified bin.
virtual int	coordToIndex (double coord) const
	Convert a coordinate on the axis to a bin number.
TAxis &	taxis () const
Static Public Member Functions
static int	toRootIndex (int index, int nbins)
static int	toAidaIndex (int index, int bins)
Private Member Functions
self &	me () const
Private Attributes
TAxis *	taxis_

---

Detailed Description

An IAxis represents a binned histogram axis.

A 1D Histogram would have one Axis representing the X axis, while a 2D Histogram would have two axes representing the X and Y Axis.

Author:

The AIDA team (http://aida.freehep.org/)

Definition at line 31 of file Axis.h.

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Member Typedef Documentation

typedef Axis Gaudi::Axis::self

Definition at line 35 of file Axis.h.

---

Constructor & Destructor Documentation

Gaudi::Axis::Axis

(

)

[inline]

Definition at line 67 of file Axis.h.

: taxis_(0) {}

Gaudi::Axis::Axis

(

TAxis *

itaxi

)

[inline, explicit]

Definition at line 69 of file Axis.h.

: taxis_(itaxi) {}

virtual Gaudi::Axis::~Axis

(

)

[inline, virtual]

Destructor.

Definition at line 74 of file Axis.h.

{}

---

Member Function Documentation

static int Gaudi::Axis::toRootIndex	(	int	index,
		int	nbins
	)			[inline, static]

Definition at line 37 of file Axis.h.

                                                 {
      if (index==AIDA::IAxis::OVERFLOW_BIN) return nbins+1;
      if (index==AIDA::IAxis::UNDERFLOW_BIN) return 0;
      return index+1;
    }

static int Gaudi::Axis::toAidaIndex	(	int	index,
		int	bins
	)			[inline, static]

Definition at line 43 of file Axis.h.

                                                {
      if ( index == bins + 1 ) return AIDA::IAxis::OVERFLOW_BIN ;
      if ( index == 0 ) return AIDA::IAxis::UNDERFLOW_BIN ;
      return index - 1 ;
    }

int Gaudi::Axis::rIndex

(

int

index

)

const [inline]

Convert a AIDA bin number on the axis to the ROOT bin number.

Parameters:

index

TheAIDA bin number

Returns:

The corresponding ROOT bin number.

Definition at line 55 of file Axis.h.

{ return toRootIndex(index, bins());}

int Gaudi::Axis::aIndex

(

int

index

)

const [inline]

Convert a ROOT bin number on the axis to the AIDA bin number.

Parameters:

index

The ROOT bin number: 1 to bins() for the in-range bins or bins()+1 for OVERFLOW or 0 for UNDERFLOW.

Returns:

The corresponding AIDA bin number.

Definition at line 63 of file Axis.h.

{ return toAidaIndex(index, bins()); }

void Gaudi::Axis::initialize	(	TAxis *	itaxi,
		bool
	)			[inline]

Definition at line 71 of file Axis.h.

{ taxis_ = itaxi; }

virtual bool Gaudi::Axis::isFixedBinning

(

)

const [inline, virtual]

Check if the IAxis has fixed binning, i.e.

if all the bins have the same width.

Returns:

true if the binning is fixed, false otherwise.

Definition at line 81 of file Axis.h.

    {
      return 0 == taxis_ ? true : !taxis_->IsVariableBinSize() ;
    }

virtual double Gaudi::Axis::lowerEdge

(

)

const [inline, virtual]

Get the lower edge of the IAxis.

Returns:

The IAxis's lower edge.

Definition at line 91 of file Axis.h.

{ return taxis().GetXmin();}

virtual double Gaudi::Axis::upperEdge

(

)

const [inline, virtual]

Get the upper edge of the IAxis.

Returns:

The IAxis's upper edge.

Definition at line 98 of file Axis.h.

{ return taxis().GetXmax();}

virtual int Gaudi::Axis::bins

(

)

const [inline, virtual]

The number of bins (excluding underflow and overflow) on the IAxis.

Returns:

The IAxis's number of bins.

Definition at line 105 of file Axis.h.

{ return taxis().GetNbins();}

virtual double Gaudi::Axis::binLowerEdge

(

int

index

)

const [inline, virtual]

Get the lower edge of the specified bin.

Parameters:

index

The bin number: 0 to bins()-1 for the in-range bins or OVERFLOW or UNDERFLOW.

Returns:

The lower edge of the corresponding bin; for the underflow bin this is Double.NEGATIVE_INFINITY.

Definition at line 113 of file Axis.h.

{ return taxis().GetBinLowEdge(rIndex(index));}

virtual double Gaudi::Axis::binUpperEdge

(

int

index

)

const [inline, virtual]

Get the upper edge of the specified bin.

Parameters:

index

The bin number: 0 to bins()-1 for the in-range bins or OVERFLOW or UNDERFLOW.

Returns:

The upper edge of the corresponding bin; for the overflow bin this is Double.POSITIVE_INFINITY.

Definition at line 120 of file Axis.h.

{ return taxis().GetBinUpEdge(rIndex(index));}

virtual double Gaudi::Axis::binWidth

(

int

index

)

const [inline, virtual]

Get the width of the specified bin.

Parameters:

index

The bin number: 0 to bins()-1) for the in-range bins or OVERFLOW or UNDERFLOW.

Returns:

The width of the corresponding bin.

Definition at line 128 of file Axis.h.

{ return taxis().GetBinWidth(rIndex(index));}

virtual int Gaudi::Axis::coordToIndex

(

double

coord

)

const [inline, virtual]

Convert a coordinate on the axis to a bin number.

If the coordinate is less than the lowerEdge UNDERFLOW is returned; if the coordinate is greater or equal to the upperEdge OVERFLOW is returned.

Parameters:

coord

The coordinate to be converted.

Returns:

The corresponding bin number.

Definition at line 139 of file Axis.h.

    {
      return aIndex( taxis().FindBin(coord) );
    }

TAxis& Gaudi::Axis::taxis

(

)

const [inline]

Definition at line 147 of file Axis.h.

{ return *me().taxis_;}

self& Gaudi::Axis::me

(

)

const [inline, private]

Definition at line 153 of file Axis.h.

{ return const_cast<self&>(*this);}

---

Member Data Documentation

TAxis* Gaudi::Axis::taxis_ [private]

Definition at line 156 of file Axis.h.

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

• /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v21r9/GaudiSvc/src/HistogramSvc/Axis.h