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 RAxisEquidistant.

Definition at line 505 of file RAxis.hxx.

Public Member Functions
	RAxisGrow (int nbins, double low, double high) noexcept
	Initialize a RAxisGrow. More...

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

bool	CanGrow () const noexcept final override
	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 RAxisConfig () const
	Convert to RAxisConfig. More...

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

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

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

bool	CanGrow () const noexcept override
	This axis cannot grow. More...

int	FindBin (double x) const noexcept final override
	Find the adjusted bin index (returning `kUnderflowBin` for underflow and `kOverflowBin` for overflow) for the given coordinate. More...

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

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

int	GetBinIndexForLowEdge (double x) const noexcept final override
	If the coordinate `x` is within 10 ULPs of a bin low edge coordinate, return the bin for which this is a low edge. 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...

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

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

Public Member Functions inherited from ROOT::Experimental::RAxisBase
virtual bool	CanGrow () const noexcept=0
	Whether this axis can grow (and thus has no overflow bins). More...

virtual int	FindBin (double x) const noexcept=0
	Find the adjusted bin index (returning `kUnderflowBin` for underflow and `kOverflowBin` for overflow) for the given coordinate. More...

virtual double	GetBinCenter (int bin) const =0
	Get the bin center for the given bin index. More...

virtual double	GetBinFrom (int bin) const =0
	Get the low bin border ("left edge") for the given bin index. More...

virtual int	GetBinIndexForLowEdge (double x) const noexcept=0
	If the coordinate `x` is within 10 ULPs of a bin low edge coordinate, return the bin for which this is a low edge. More...

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

int	GetFirstBin () const noexcept
	Get the bin index for the first bin of the axis. More...

int	GetLastBin () const noexcept
	Get the bin index for the last bin of the axis. More...

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

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

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

virtual int	GetNBinsNoOver () const noexcept=0
	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 overflow bin (or `kInvalidBin` if CanGrow()). More...

const std::string &	GetTitle () const
	Get the axis's title. More...

int	GetUnderflowBin () const noexcept
	Get the bin index for the underflow bin (or `kInvalidBin` if CanGrow()). More...

bool	HasSameBinningAs (const RAxisBase &other) const
	Check if two axes use the same binning convention, i.e. More...

const_iterator	begin () const noexcept
	Get a const_iterator pointing to the first regular bin. More...

const_iterator	end () const noexcept
	Get a const_iterator pointing beyond the last regular bin. More...

Additional Inherited Members
Static Public Attributes inherited from ROOT::Experimental::RAxisBase
static constexpr const int	kInvalidBin = 0
	Special bin index returned to signify that no bin matches a request. More...

static constexpr const int	kOverflowBin = -2
	Index of the overflow bin, if any. More...

static constexpr const int	kUnderflowBin = -1
	Index of the underflow bin, if any. More...

Protected Member Functions inherited from ROOT::Experimental::RAxisEquidistant
double	FindBinRaw (double x) const noexcept
	Find the raw bin index (not adjusted) for the given coordinate. More...

bool	HasSameBinBordersAs (const RAxisBase &other) const override
	See RAxisBase::HasSameBinBordersAs. More...

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

	RAxisBase (std::string_view title) noexcept
	Construct a RAxisBase. More...

virtual	~RAxisBase ()
	Virtual destructor needed in this inheritance-based design. More...

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

virtual bool	HasSameBinBordersAs (const RAxisBase &other) const
	Check if two axis have the same bin borders. More...

	RAxisBase (const RAxisBase &)=default

	RAxisBase (RAxisBase &&)=default

RAxisBase &	operator= (const RAxisBase &)=default

RAxisBase &	operator= (RAxisBase &&)=default

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

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

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

unsigned int	fNBinsNoOver
	Number of bins excluding under- and overflow. More...

#include <ROOT/RAxis.hxx>

Inheritance diagram for ROOT::Experimental::RAxisGrow:

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Constructor & Destructor Documentation

◆ RAxisGrow() [1/2]

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

inlineexplicitnoexcept

Initialize a RAxisGrow.

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 516 of file RAxis.hxx.

◆ RAxisGrow() [2/2]

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

inlineexplicitnoexcept

Initialize a RAxisGrow.

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 530 of file RAxis.hxx.

Member Function Documentation

◆ CanGrow()

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

inlinefinaloverridevirtualnoexcept

This axis kind can increase its range.

Reimplemented from ROOT::Experimental::RAxisEquidistant.

Definition at line 562 of file RAxis.hxx.

◆ Grow()

int ROOT::Experimental::RAxisGrow::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 RAxisGrow 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 RAxisConfig()

ROOT::Experimental::RAxisGrow::operator RAxisConfig ( ) const

inline

Convert to RAxisConfig.

Definition at line 533 of file RAxis.hxx.

Libraries for ROOT::Experimental::RAxisGrow:

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Public Member Functions

Additional Inherited Members

Constructor & Destructor Documentation

◆ RAxisGrow() [1/2]

◆ RAxisGrow() [2/2]

Member Function Documentation

◆ CanGrow()

◆ Grow()

◆ operator RAxisConfig()