An axis with non-equidistant bins (also known as "variable binning").

It is defined by an array of bin borders - one more than the number of (non-overflow-) bins it has! As an example, an axis with two bin needs three bin borders:

lower edge of the first bin;
higher edge of the first bin, identical to the lower edge of the second bin;
higher edge of the second bin

This axis cannot grow; the size of new bins would not be well defined.

Definition at line 595 of file TAxis.hxx.

Public Member Functions
	TAxisIrregular ()=default

	TAxisIrregular (const std::vector< double > &binborders)
	Construct a TAxisIrregular from a vector of bin borders. More...

	TAxisIrregular (std::vector< double > &&binborders) noexcept
	Construct a TAxisIrregular from a vector of bin borders. More...

	TAxisIrregular (std::string_view title, const std::vector< double > &binborders)
	Construct a TAxisIrregular from a vector of bin borders. More...

	TAxisIrregular (std::string_view title, std::vector< double > &&binborders) noexcept
	Construct a TAxisIrregular from a vector of bin borders. More...

int	FindBin (double x) const noexcept
	Find the bin index corresponding to coordinate x. More...

const std::vector< double > &	GetBinBorders () const noexcept
	Access to the bin borders used by this axis. More...

double	GetBinCenter (int bin) const noexcept
	Get the bin center of the bin with the given index. More...

double	GetBinFrom (int bin) const noexcept
	Get the lower bin border for a given bin index. More...

double	GetBinTo (int bin) const noexcept
	Get the higher bin border for a given bin index. More...

	operator TAxisConfig () const
	Convert to TAxisConfig. More...

Public Member Functions inherited from ROOT::Experimental::TAxisBase
	TAxisBase (std::string_view title, int nbinsNoOver, bool canGrow) noexcept
	Construct a TAxisBase. More...

	TAxisBase (int nbinsNoOver, bool canGrow) noexcept
	Construct a TAxisBase. More...

int	GetNBins () const noexcept
	Get the number of bins, including under- and overflow. More...

int	GetNBinsNoOver () const noexcept
	Get the number of bins, excluding under- and overflow. More...

int	GetNOverflowBins () const noexcept
	Get the number of over- and underflow bins: 0 for growable axes, 2 otherwise. More...

int	GetOverflowBin () const noexcept
	Get the bin index for the underflow bin (or the next bin outside range if CanGrow()). More...

const std::string &	GetTitle () const

int	GetUnderflowBin () const noexcept
	Get the bin index for the underflow bin. More...

bool	IsOverflowBin (int bin) const noexcept
	Whether the bin index is referencing a bin higher than the axis range. More...

bool	IsUnderflowBin (int bin) const noexcept
	Whether the bin index is referencing a bin lower than the axis range. More...

const_iterator	begin () const noexcept
	Get a const_iterator pointing to the first non-underflow bin. More...

const_iterator	begin_with_underflow () const noexcept
	Get a const_iterator pointing the underflow bin. More...

const_iterator	end () const noexcept
	Get a const_iterator pointing right beyond the last non-overflow bin (i.e. More...

const_iterator	end_with_overflow () const noexcept
	Get a const_iterator pointing right beyond the overflow bin. More...

Static Public Member Functions
static bool	CanGrow () noexcept
	This axis cannot be extended. More...

Private Attributes
std::vector< double >	fBinBorders
	Bin borders, one more than the number of non-overflow bins. More...

Additional Inherited Members
Public Types inherited from ROOT::Experimental::TAxisBase
enum	EFindStatus { EFindStatus::kCanGrow, EFindStatus::kValid }
	Status of FindBin(x) More...

Static Public Attributes inherited from ROOT::Experimental::TAxisBase
static constexpr const int	kIgnoreBin = -1
	FindBin() returns this bin to signal that the bin number is invalid. More...

static constexpr const int	kNOverflowBins [4] = {0, 1, 1, 2}
	Extra bins for each EAxisOverflow value. More...

Protected Member Functions inherited from ROOT::Experimental::TAxisBase
	TAxisBase ()=default
	Default construct a TAxisBase (for use by derived classes for I/O) More...

int	AdjustOverflowBinNumber (double rawbin) const
	Given rawbin (<0 for underflow, >= GetNBinsNoOver() for overflow), determine the actual bin number taking into account how over/underflow should be handled. More...

	TAxisBase (const TAxisBase &)=default

	TAxisBase (TAxisBase &&)=default

TAxisBase &	operator= (const TAxisBase &)=default

TAxisBase &	operator= (TAxisBase &&)=default

#include <ROOT/TAxis.hxx>

Inheritance diagram for ROOT::Experimental::TAxisIrregular:

[legend]

Constructor & Destructor Documentation

◆ TAxisIrregular() [1/5]

ROOT::Experimental::TAxisIrregular::TAxisIrregular ( )

default

◆ TAxisIrregular() [2/5]

ROOT::Experimental::TAxisIrregular::TAxisIrregular ( const std::vector< double > & binborders )

inlineexplicit

Construct a TAxisIrregular from a vector of bin borders.

Note: The bin borders must be sorted in increasing order!

Definition at line 605 of file TAxis.hxx.

◆ TAxisIrregular() [3/5]

ROOT::Experimental::TAxisIrregular::TAxisIrregular ( std::vector< double > && binborders )

inlineexplicitnoexcept

Construct a TAxisIrregular from a vector of bin borders.

Note: The bin borders must be sorted in increasing order! Faster, noexcept version taking an rvalue of binborders. The compiler will know when it can take this one.

Definition at line 618 of file TAxis.hxx.

◆ TAxisIrregular() [4/5]

ROOT::Experimental::TAxisIrregular::TAxisIrregular	(	std::string_view	title,
		const std::vector< double > &	binborders
	)

inlineexplicit

Construct a TAxisIrregular from a vector of bin borders.

Note: The bin borders must be sorted in increasing order!

Definition at line 629 of file TAxis.hxx.

◆ TAxisIrregular() [5/5]

ROOT::Experimental::TAxisIrregular::TAxisIrregular	(	std::string_view	title,
		std::vector< double > &&	binborders
	)

inlineexplicitnoexcept

Construct a TAxisIrregular from a vector of bin borders.

Note: The bin borders must be sorted in increasing order! Faster, noexcept version taking an rvalue of binborders. The compiler will know when it can take this one.

Definition at line 642 of file TAxis.hxx.

Member Function Documentation

◆ CanGrow()

static bool ROOT::Experimental::TAxisIrregular::CanGrow ( )

inlinestaticnoexcept

This axis cannot be extended.

Definition at line 713 of file TAxis.hxx.

◆ FindBin()

int ROOT::Experimental::TAxisIrregular::FindBin ( double x ) const

inlinenoexcept

Find the bin index corresponding to coordinate x.

If the coordinate is below the axis range, return 0. If it is above, return N + 1 for an axis with N non-overflow bins.

Definition at line 657 of file TAxis.hxx.

◆ GetBinBorders()

const std::vector<double>& ROOT::Experimental::TAxisIrregular::GetBinBorders ( ) const

inlinenoexcept

Access to the bin borders used by this axis.

Definition at line 716 of file TAxis.hxx.

◆ GetBinCenter()

double ROOT::Experimental::TAxisIrregular::GetBinCenter ( int bin ) const

inlinenoexcept

Get the bin center of the bin with the given index.

For the bin at index 0 (i.e. the underflow bin), a bin center of std::numeric_limits<double>::min() is returned, i.e. the minimum value that can be held in a double. Similarly, for the bin at index N + 1 (i.e. the overflow bin), a bin center of std::numeric_limits<double>::max() is returned, i.e. the maximum value that can be held in a double.

Definition at line 677 of file TAxis.hxx.

◆ GetBinFrom()

double ROOT::Experimental::TAxisIrregular::GetBinFrom ( int bin ) const

inlinenoexcept

Get the lower bin border for a given bin index.

For the bin at index 0 (i.e. the underflow bin), a lower bin border of std::numeric_limits<double>::min() is returned, i.e. the minimum value that can be held in a double.

Definition at line 691 of file TAxis.hxx.

◆ GetBinTo()

double ROOT::Experimental::TAxisIrregular::GetBinTo ( int bin ) const

inlinenoexcept

Get the higher bin border for a given bin index.

For the bin at index N + 1 (i.e. the overflow bin), a bin border of std::numeric_limits<double>::max() is returned, i.e. the maximum value that can be held in a double.

Definition at line 705 of file TAxis.hxx.

◆ operator TAxisConfig()

ROOT::Experimental::TAxisIrregular::operator TAxisConfig ( ) const

inline

Convert to TAxisConfig.

Definition at line 652 of file TAxis.hxx.

Member Data Documentation

◆ fBinBorders

std::vector<double> ROOT::Experimental::TAxisIrregular::fBinBorders

private

Bin borders, one more than the number of non-overflow bins.

Definition at line 598 of file TAxis.hxx.

Libraries for ROOT::Experimental::TAxisIrregular:

[legend]

Public Member Functions

Static Public Member Functions

Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ TAxisIrregular() [1/5]

◆ TAxisIrregular() [2/5]

◆ TAxisIrregular() [3/5]

◆ TAxisIrregular() [4/5]

◆ TAxisIrregular() [5/5]

Member Function Documentation

◆ CanGrow()

◆ FindBin()

◆ GetBinBorders()

◆ GetBinCenter()

◆ GetBinFrom()

◆ GetBinTo()

◆ operator TAxisConfig()

Member Data Documentation

◆ fBinBorders