An axis that can extend its range, keeping the number of its bins unchanged.

The axis is constructed with an initial range. Apart from its ability to grow, this axis behaves like a TAxisEquidistant.

Definition at line 549 of file TAxis.hxx.

Public Member Functions
	TAxisGrow (std::string_view title, int nbins, double low, double high) noexcept
	Initialize a TAxisGrow. More...

	TAxisGrow (int nbins, double low, double high) noexcept
	Initialize a TAxisGrow. More...

bool	CanGrow () const
	This axis kind can increase its range. More...

int	Grow (int toBin)
	Grow this axis to make the "virtual bin" toBin in-range. More...

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

Public Member Functions inherited from ROOT::Experimental::TAxisEquidistant
	TAxisEquidistant ()=default

	TAxisEquidistant (int nbinsNoOver, double low, double high) noexcept
	Initialize a TAxisEquidistant. More...

	TAxisEquidistant (std::string_view title, int nbinsNoOver, double low, double high) noexcept
	Initialize a TAxisEquidistant. More...

int	FindBin (double x) const noexcept
	Find the bin index for the given coordinate. More...

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

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

int	GetBinIndexForLowEdge (double x) const noexcept
	If the coordinate `x` is a bin low edge (within 1E-6 of the coordinate), return the bin for which this is a low edge. More...

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

double	GetBinWidth () const noexcept
	Get the width of the bins. More...

double	GetInverseBinWidth () const noexcept
	Get the inverse of the width of the bins. More...

double	GetMaximum () const noexcept
	Get the high end of the axis range. More...

double	GetMinimum () const noexcept
	Get the low end of the axis range. 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...

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

Static Public Member Functions inherited from ROOT::Experimental::TAxisEquidistant
static bool	CanGrow () noexcept
	This axis cannot grow. 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::TAxisEquidistant
	TAxisEquidistant (std::string_view title, int nbinsNoOver, double low, double high, bool canGrow) noexcept
	Initialize a TAxisEquidistant. More...

	TAxisEquidistant (int nbinsNoOver, double low, double high, bool canGrow) noexcept
	Initialize a TAxisEquidistant. More...

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

int	AdjustOverflowBinNumber (int 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

Static Protected Member Functions inherited from ROOT::Experimental::TAxisEquidistant
static double	GetInvBinWidth (int nbinsNoOver, double lowOrHigh, double highOrLow)
	Determine the inverse bin width. More...

Protected Attributes inherited from ROOT::Experimental::TAxisEquidistant
double	fInvBinWidth = 0.
	The inverse of the bin width. More...

double	fLow = 0.
	The lower limit of the axis. More...

#include <ROOT/TAxis.hxx>

Inheritance diagram for ROOT::Experimental::TAxisGrow:

[legend]

Constructor & Destructor Documentation

◆ TAxisGrow() [1/2]

ROOT::Experimental::TAxisGrow::TAxisGrow	(	std::string_view	title,
		int	nbins,
		double	low,
		double	high
	)

inlineexplicitnoexcept

Initialize a TAxisGrow.

Parameters

nbins	- number of bins in the axis, excluding under- and overflow bins. This value is fixed over the lifetime of the object.
low	- the initial value for the low axis range. Any coordinate below that is considered as underflow. To trigger the growing of the axis call Grow().
high	- the initial value for the high axis range. Any coordinate above that is considered as overflow. To trigger the growing of the axis call Grow()

Definition at line 560 of file TAxis.hxx.

◆ TAxisGrow() [2/2]

ROOT::Experimental::TAxisGrow::TAxisGrow	(	int	nbins,
		double	low,
		double	high
	)

inlineexplicitnoexcept

Initialize a TAxisGrow.

Parameters

[in]	title	- axis title used for graphics and text representation.
	nbins	- number of bins in the axis, excluding under- and overflow bins. This value is fixed over the lifetime of the object.
	low	- the initial value for the low axis range. Any coordinate below that is considered as underflow. To trigger the growing of the axis call Grow().
	high	- the initial value for the high axis range. Any coordinate above that is considered as overflow. To trigger the growing of the axis call Grow()

Definition at line 574 of file TAxis.hxx.

Member Function Documentation

◆ CanGrow()

bool ROOT::Experimental::TAxisGrow::CanGrow ( ) const

inline

This axis kind can increase its range.

Definition at line 609 of file TAxis.hxx.

◆ Grow()

int ROOT::Experimental::TAxisGrow::Grow ( int toBin )

Grow this axis to make the "virtual bin" toBin in-range.

This keeps the non-affected axis limit unchanged, and extends the other axis limit such that a number of consecutive bins are merged.

Example, assuming an initial TAxisGrow with 10 bins from 0. to 1.:

Grow(0): that (virtual) bin spans from -0.1 to 0. To include it in the axis range, the lower limit must be shifted. The minimal number of bins that can be merged is 2, thus the new axis will span from -1. to 1.
Grow(-1): that (virtual) bin spans from -0.2 to 0.1. To include it in the axis range, the lower limit must be shifted. The minimal number of bins that can be merged is 2, thus the new axis will span from -1. to 1.
Grow(50): that (virtual) bin spans from 4.9 to 5.0. To include it in the axis range, the higher limit must be shifted. Five bins need to be merged, making the new axis range 0. to 5.0.

Parameters

toBin - the "virtual" bin number, as if the axis had an infinite number of bins with the current bin width. For instance, for an axis with ten bins in the range 0. to 1., the coordinate 2.05 has the virtual bin index 20.

Returns: Returns the number of bins that were merged to reach the value. A value of 1 means that no bins were merged (toBin was in the original axis range).

◆ operator TAxisConfig()

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

inline

Convert to TAxisConfig.

Definition at line 578 of file TAxis.hxx.

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

hist/hist/v7/inc/ROOT/TAxis.hxx

Public Member Functions

Additional Inherited Members

Constructor & Destructor Documentation

◆ TAxisGrow() [1/2]

◆ TAxisGrow() [2/2]

Member Function Documentation

◆ CanGrow()

◆ Grow()

◆ operator TAxisConfig()