Spatial energy dependent Gaussian model class. More...

#include <GCTAModelSpatialGaussSpectrum.hpp>

Inheritance diagram for GCTAModelSpatialGaussSpectrum:

Public Member Functions
	GCTAModelSpatialGaussSpectrum (void)
	Void constructor. More...

	GCTAModelSpatialGaussSpectrum (const double &sigma)
	Energy-independent Gaussian constructor. More...

	GCTAModelSpatialGaussSpectrum (const GModelSpectral &sigma)
	Gaussian spectrum constructor. More...

	GCTAModelSpatialGaussSpectrum (const GXmlElement &xml)
	XML constructor. More...

	GCTAModelSpatialGaussSpectrum (const GCTAModelSpatialGaussSpectrum &model)
	Copy constructor. More...

virtual	~GCTAModelSpatialGaussSpectrum (void)
	Destructor. More...

virtual GCTAModelSpatialGaussSpectrum &	operator= (const GCTAModelSpatialGaussSpectrum &model)
	Assignment operator. More...

virtual void	clear (void)
	Clear instance. More...

virtual GCTAModelSpatialGaussSpectrum *	clone (void) const
	Clone instance. More...

virtual std::string	classname (void) const
	Return class name. More...

virtual std::string	type (void) const
	Return model type. More...

virtual double	eval (const GCTAInstDir &dir, const GEnergy &energy, const GTime &time, const bool &gradients=false) const
	Evaluate function. More...

virtual double	mc_max_value (const GCTAObservation &obs) const
	Return maximum function value for Monte Carlo simulations. More...

virtual void	read (const GXmlElement &xml)
	Read model from XML element. More...

virtual void	write (GXmlElement &xml) const
	Write model into XML element. More...

virtual std::string	print (const GChatter &chatter=NORMAL) const
	Print point source information. More...

const GModelSpectral *	sigma (void) const
	Return pointer to sigma spectrum. More...

void	sigma (const double &sigma)
	Set sigma spectrum from value. More...

void	sigma (const GModelSpectral &sigma)
	Set sigma spectrum. More...

Public Member Functions inherited from GCTAModelSpatial
	GCTAModelSpatial (void)
	Void constructor. More...

	GCTAModelSpatial (const GCTAModelSpatial &model)
	Copy constructor. More...

virtual	~GCTAModelSpatial (void)
	Destructor. More...

virtual GCTAModelSpatial &	operator= (const GCTAModelSpatial &model)
	Assignment operator. More...

virtual GModelPar &	operator[] (const int &index)
	Returns model parameter. More...

virtual const GModelPar &	operator[] (const int &index) const
	Returns model parameter (const version) More...

virtual GModelPar &	operator[] (const std::string &name)
	Returns reference to model parameter. More...

virtual const GModelPar &	operator[] (const std::string &name) const
	Returns reference to model parameter (const version) More...

virtual GCTAInstDir	mc (const GEnergy &energy, const GTime &time, const GCTAObservation &obs, GRan &ran) const
	Returns MC instrument direction. More...

int	size (void) const
	Return number of model parameters. More...

virtual double	npred (const GEnergy &energy, const GTime &time, const GObservation &obs) const
	Return integral of spatial model component. More...

Public Member Functions inherited from GBase
virtual	~GBase (void)
	Destructor. More...

Protected Member Functions
void	init_members (void)
	Initialise class members. More...

void	copy_members (const GCTAModelSpatialGaussSpectrum &model)
	Copy class members. More...

void	free_members (void)
	Delete class members. More...

void	set_pointers (void)
	Set pointers. More...

Protected Member Functions inherited from GCTAModelSpatial
void	init_members (void)
	Initialise class members. More...

void	copy_members (const GCTAModelSpatial &model)
	Copy class members. More...

void	free_members (void)
	Delete class members. More...

Protected Attributes
GModelSpectral *	m_sigma

Protected Attributes inherited from GCTAModelSpatial
std::vector< GModelPar * >	m_pars
	Parameter pointers. More...

Detailed Description

Spatial energy dependent Gaussian model class.

Definition at line 48 of file GCTAModelSpatialGaussSpectrum.hpp.

Constructor & Destructor Documentation

GCTAModelSpatialGaussSpectrum::GCTAModelSpatialGaussSpectrum ( void )

Void constructor.

Definition at line 68 of file GCTAModelSpatialGaussSpectrum.cpp.

References init_members().

Referenced by clone().

GCTAModelSpatialGaussSpectrum::GCTAModelSpatialGaussSpectrum ( const double & sigma )

explicit

Energy-independent Gaussian constructor.

Parameters

[in] sigma Gaussian width (degrees \(^2\)).

Definition at line 84 of file GCTAModelSpatialGaussSpectrum.cpp.

References init_members(), and sigma().

GCTAModelSpatialGaussSpectrum::GCTAModelSpatialGaussSpectrum ( const GModelSpectral & sigma )

explicit

Gaussian spectrum constructor.

Parameters

[in] sigma Spectrum defining the energy-deependent Gaussian width (degrees \(^2\)).

Definition at line 104 of file GCTAModelSpatialGaussSpectrum.cpp.

References init_members(), and sigma().

GCTAModelSpatialGaussSpectrum::GCTAModelSpatialGaussSpectrum ( const GXmlElement & xml )

explicit

XML constructor.

Parameters

[in] xml XML element.

Creates instance of a spatial energy-dependent Gaussian model by extracting information from an XML element. See GCTAModelSpatialGaussSpectrum::read() for more information about the expected structure of the XML element.

Definition at line 128 of file GCTAModelSpatialGaussSpectrum.cpp.

References init_members(), and read().

GCTAModelSpatialGaussSpectrum::GCTAModelSpatialGaussSpectrum ( const GCTAModelSpatialGaussSpectrum & model )

Copy constructor.

Parameters

[in] model Energy-dependent Gaussian model.

Definition at line 147 of file GCTAModelSpatialGaussSpectrum.cpp.

References copy_members(), and init_members().

GCTAModelSpatialGaussSpectrum::~GCTAModelSpatialGaussSpectrum ( void )

virtual

Destructor.

Definition at line 164 of file GCTAModelSpatialGaussSpectrum.cpp.

References free_members().

Member Function Documentation

std::string GCTAModelSpatialGaussSpectrum::classname ( void ) const

inlinevirtual

Return class name.

Returns: String containing the class name ("GCTAModelSpatialGaussSpectrum").

Implements GCTAModelSpatial.

Definition at line 100 of file GCTAModelSpatialGaussSpectrum.hpp.

void GCTAModelSpatialGaussSpectrum::clear ( void )

virtual

Clear instance.

Implements GCTAModelSpatial.

Definition at line 218 of file GCTAModelSpatialGaussSpectrum.cpp.

References free_members(), GCTAModelSpatial::free_members(), init_members(), and GCTAModelSpatial::init_members().

Referenced by read(), and sigma().

GCTAModelSpatialGaussSpectrum * GCTAModelSpatialGaussSpectrum::clone ( void ) const

virtual

Clone instance.

Implements GCTAModelSpatial.

Definition at line 236 of file GCTAModelSpatialGaussSpectrum.cpp.

References GCTAModelSpatialGaussSpectrum().

void GCTAModelSpatialGaussSpectrum::copy_members ( const GCTAModelSpatialGaussSpectrum & model )

protected

Copy class members.

Parameters

[in] model Energy-dependent Gaussian model.

Definition at line 530 of file GCTAModelSpatialGaussSpectrum.cpp.

References GModelSpectral::clone(), m_sigma, and set_pointers().

Referenced by GCTAModelSpatialGaussSpectrum(), and operator=().

double GCTAModelSpatialGaussSpectrum::eval	(	const GCTAInstDir &	dir,
		const GEnergy &	energy,
		const GTime &	time,
		const bool &	gradients = `false`
	)		const

virtual

Evaluate function.

Parameters

[in]	dir	Event direction.
[in]	energy	Event energy.
[in]	time	Event time.
[in]	gradients	Compute gradients?

Returns: Function value

Evaluates the energy-dependent Gaussian model for a given event direction. The Gaussian model is defined by

\[f(\theta,E) = \exp \left(-\frac{1}{2} \left( \frac{\theta^2}{\sigma(E)} \right)^2 \right)\]

where \(\theta\) is the offset angle (in degrees), and \(\sigma(E)\) is the energy-dependent Gaussian width (in degrees \(^2\)).

If the gradients flag is true the method will also compute the partial derivatives of the parameters. The partial derivative of the Gaussian width is given by

\[\frac{df}{d\sigma_v} = f(\theta) \frac{\theta^4}{\sigma^3} \sigma_s\]

where \(\sigma_v\) is the value part, \(\sigma_s\) is the scaling part, and \(\sigma = \sigma_v \sigma_s\).

Note that this method implements a function which is unity for \(\theta=0\).

Implements GCTAModelSpatial.

Definition at line 275 of file GCTAModelSpatialGaussSpectrum.cpp.

References GModelSpectral::eval(), exp(), GOptimizerPar::gradient(), gammalib::is_infinite(), gammalib::is_notanumber(), m_sigma, gammalib::rad2deg, sigma(), GModelSpectral::size(), and GCTAInstDir::theta().

void GCTAModelSpatialGaussSpectrum::free_members ( void )

protected

Delete class members.

Definition at line 548 of file GCTAModelSpatialGaussSpectrum.cpp.

References m_sigma.

Referenced by clear(), operator=(), and ~GCTAModelSpatialGaussSpectrum().

void GCTAModelSpatialGaussSpectrum::init_members ( void )

protected

Initialise class members.

Definition at line 512 of file GCTAModelSpatialGaussSpectrum.cpp.

References GCTAModelSpatial::m_pars, and m_sigma.

Referenced by clear(), GCTAModelSpatialGaussSpectrum(), and operator=().

double GCTAModelSpatialGaussSpectrum::mc_max_value ( const GCTAObservation & obs ) const

inlinevirtual

Return maximum function value for Monte Carlo simulations.

Parameters

[in] obs CTA Observation.

Returns: Maximum function value for Monte Carlo simulations.

This method always returns 1.

Implements GCTAModelSpatial.

Definition at line 127 of file GCTAModelSpatialGaussSpectrum.hpp.

GCTAModelSpatialGaussSpectrum & GCTAModelSpatialGaussSpectrum::operator= ( const GCTAModelSpatialGaussSpectrum & model )

virtual

Assignment operator.

Parameters

[in] model Energy-dependent Gaussian model.

Definition at line 185 of file GCTAModelSpatialGaussSpectrum.cpp.

References copy_members(), free_members(), init_members(), and GCTAModelSpatial::operator=().

std::string GCTAModelSpatialGaussSpectrum::print ( const GChatter & chatter = NORMAL ) const

virtual

Print point source information.

Parameters

[in] chatter Chattiness.

Returns: String containing point source information.

Implements GCTAModelSpatial.

Definition at line 471 of file GCTAModelSpatialGaussSpectrum.cpp.

References m_sigma, gammalib::parformat(), SILENT, GModelSpectral::size(), and GModelSpectral::type().

void GCTAModelSpatialGaussSpectrum::read ( const GXmlElement & xml )

virtual

Read model from XML element.

Parameters

[in] xml XML element.

Read the energy-dependent Gaussian spatial model information from an XML element. The XML element needs to be of the following format:

<spatialModel type="EnergyDependentGaussian">
  <sigma type="...">
    ...
  </sigma>
</spatialModel>

where any spectral model type can be provided for the sigma tag.

Implements GCTAModelSpatial.

Definition at line 351 of file GCTAModelSpatialGaussSpectrum.cpp.

References GModelSpectralRegistry::alloc(), clear(), GXmlNode::element(), m_sigma, set_pointers(), and sigma().

Referenced by GCTAModelSpatialGaussSpectrum().

void GCTAModelSpatialGaussSpectrum::set_pointers ( void )

protected

Set pointers.

Set pointers to all model parameters. The pointers are stored in a vector that is member of the GModelData base class.

Definition at line 567 of file GCTAModelSpatialGaussSpectrum.cpp.

References GCTAModelSpatial::m_pars, m_sigma, and GModelSpectral::size().

Referenced by copy_members(), read(), and sigma().

const GModelSpectral * GCTAModelSpatialGaussSpectrum::sigma ( void ) const

inline

Return pointer to sigma spectrum.

Returns: Pointer to sigma spectrum.

Definition at line 139 of file GCTAModelSpatialGaussSpectrum.hpp.

References m_sigma.

Referenced by eval(), GCTAModelSpatialGaussSpectrum(), read(), and write().

void GCTAModelSpatialGaussSpectrum::sigma ( const double & sigma )

Set sigma spectrum from value.

Parameters

[in] sigma Constant sigma value.

Definition at line 428 of file GCTAModelSpatialGaussSpectrum.cpp.

References clear(), m_sigma, and set_pointers().

void GCTAModelSpatialGaussSpectrum::sigma ( const GModelSpectral & sigma )

Set sigma spectrum.

Parameters

[in] sigma Sigma spectrum.

Definition at line 449 of file GCTAModelSpatialGaussSpectrum.cpp.

References clear(), GModelSpectral::clone(), m_sigma, and set_pointers().

std::string GCTAModelSpatialGaussSpectrum::type ( void ) const

inlinevirtual

Return model type.

Returns: Model type "EnergyDependentGaussian".

Implements GCTAModelSpatial.

Definition at line 112 of file GCTAModelSpatialGaussSpectrum.hpp.

Referenced by write().

void GCTAModelSpatialGaussSpectrum::write ( GXmlElement & xml ) const

virtual

Write model into XML element.

Parameters

[in] xml XML element.

Exceptions

GException::invalid_value Spatial model is not of valid type.

Write the energy-dependent Gaussian spatial model information into an XML element. The XML element will be of the following format:

<spatialModel type="EnergyDependentGaussian">
  <sigma type="...">
    ...
  </sigma>
</spatialModel>

where the spectral sigma model will be written into the sigma tag.

Implements GCTAModelSpatial.

Definition at line 390 of file GCTAModelSpatialGaussSpectrum.cpp.

References GXmlNode::append(), GXmlElement::attribute(), GXmlNode::element(), GXmlNode::elements(), G_WRITE, m_sigma, sigma(), type(), and GModelSpectral::write().

Member Data Documentation

GModelSpectral* GCTAModelSpatialGaussSpectrum::m_sigma

protected

Definition at line 90 of file GCTAModelSpatialGaussSpectrum.hpp.

Referenced by copy_members(), eval(), free_members(), init_members(), print(), read(), set_pointers(), sigma(), and write().

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

inst/cta/include/GCTAModelSpatialGaussSpectrum.hpp
inst/cta/src/GCTAModelSpatialGaussSpectrum.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation