Parameter handling for 3 dimensional Gaussian class. More...

#include <Gaussian3DParam.h>

Inheritance diagram for casacore::Gaussian3DParam< Type >:

Public Types
enum	{ H, CX, CY, CZ, AX, AY, AZ, THETA, PHI, NPAR }
	Parameter handling for the functional for 3D Gaussian Class. More...

Public Types inherited from casacore::Function< Type >
typedef FunctionTraits< Type > ::ArgType	ArgType

typedef const ArgType *	FunctionArg

Public Member Functions
	Gaussian3DParam ()
	Constructs the three dimensional Gaussians. More...

	Gaussian3DParam (Type height, const Vector< Type > &center, const Vector< Type > &width, Type theta, Type phi)

	Gaussian3DParam (Type &height, Type &xCenter, Type &yCenter, Type &zCenter, Type &xWidth, Type &yWidth, Type &zWidth, Type &theta, Type &phi)

	Gaussian3DParam (const Gaussian3DParam< Type > &other)
	Copy construcor. More...

template<class W >
	Gaussian3DParam (const Gaussian3DParam< W > &other)

Gaussian3DParam< Type > &	operator= (const Gaussian3DParam< Type > &other)
	Copy assignment. More...

virtual	~Gaussian3DParam ()
	Destructor. More...

virtual const String &	name () const
	Give name of function. More...

virtual uInt	ndim () const
	Return dimensionality. More...

Type	height () const
	Get or set the peak height of the Gaussian. More...

void	setHeight (const Type &height)

Type	flux () const
	Get or set the total flux of the Gaussian. More...

void	setFlux (const Type &flux)

Vector< Type >	center () const
	Get or cet the center coordinates of the Gaussian. More...

void	setCenter (const Vector< Type > &center)

Type	xCenter () const

void	setXcenter (const Type &xcenter)

Type	yCenter () const

void	setYcenter (const Type &ycenter)

Type	zCenter () const

void	setZcenter (const Type &zcenter)

Vector< Type >	width () const
	Get or set the sigma-width of the Gaussian. More...

void	setWidth (const Vector< Type > &width)

void	setXwidth (const Type &xwidth)

Type	xWidth () const

void	setYwidth (const Type &ywidth)

Type	yWidth () const

void	setZwidth (const Type &zwidth)

Type	zWidth () const

Type	theta () const
	Get or set the rotation angles of the Gaussian. More...

void	settheta (const Type &sT)

Type	phi () const

void	setphi (const Type &sP)

Public Member Functions inherited from casacore::Function< Type >
	Function ()
	Constructors. More...

	Function (const uInt n)

	Function (const Vector< Type > &in)

	Function (const FunctionParam< Type > &other)

	Function (const Function< W, X > &other)

	Function (const Function< Type, U > &other)

virtual	~Function ()
	Destructor. More...

uInt	nparameters () const
	Returns the number of parameters. More...

virtual U	eval (FunctionArg x) const =0
	Evaluate the function object. More...

Type &	operator[] (const uInt n)
	Manipulate the nth parameter (0-based) with no index check. More...

const Type &	operator[] (const uInt n) const

virtual U	operator() () const
	Evaluate this function object at `x`or at `x, y`. More...

virtual U	operator() (const ArgType &x) const

virtual U	operator() (const Vector< ArgType > &x) const

virtual U	operator() (FunctionArg x) const

virtual U	operator() (const ArgType &x, const ArgType &y) const

virtual U	operator() (const ArgType &x, const ArgType &y, const ArgType &z) const

Bool &	mask (const uInt n)
	Manipulate the mask associated with the nth parameter (e.g. More...

const Bool &	mask (const uInt n) const

const FunctionParam< Type > &	parameters () const
	Return the parameter interface. More...

FunctionParam< Type > &	parameters ()

const Vector< ArgType > &	argp () const
	Get `arg_p` and `parset_p`. More...

Bool	parsetp () const

void	lockParam ()
	Compiler cannot always find the correct 'const' version of parameter access. More...

void	unlockParam ()

virtual void	setMode (const RecordInterface &mode)
	get/set the function mode. More...

virtual void	getMode (RecordInterface &mode) const

virtual Bool	hasMode () const
	return True if the implementing function supports a mode. More...

ostream &	print (ostream &os) const
	Print the function (i.e. More...

virtual Function< Type, U > *	clone () const =0
	Return a copy of this object from the heap. More...

virtual Function< typename FunctionTraits< Type > ::DiffType > *	cloneAD () const

virtual Function< typename FunctionTraits< Type > ::BaseType > *	cloneNonAD () const

Public Member Functions inherited from casacore::Functional< Domain, Range >
virtual	~Functional ()
	Destructor. More...

virtual Range	operator() (const Domain &x) const =0
	Map a Domain `x` into a Range `y` value. More...

Protected Member Functions
void	settrigvals () const

Protected Attributes
Type	fwhm2int

Type	stoT_p

Type	stoP_p

Type	cosT_p

Type	sinT_p

Type	cosP_p

Type	sinP_p

Type	cosTcosP_p

Type	cosTsinP_p

Type	sinTcosP_p

Type	sinTsinP_p

Protected Attributes inherited from casacore::Function< Type >
FunctionParam< Type >	param_p
	The parameters and masks. More...

Vector< ArgType >	arg_p
	Aid for non-contiguous argument storage. More...

Bool	parset_p
	Indicate parameter written. More...

Bool	locked_p
	Indicate that parameters are expected to be locked from changing. More...

Detailed Description

template<class Type>
class casacore::Gaussian3DParam< Type >

Parameter handling for 3 dimensional Gaussian class.

Intended use:

Internal

Review Status

Test programs:: tGaussian3DParam

Prerequisite

FunctionParam class
Function class

Etymology

A 3-dimensional Gaussian's parameters.

Synopsis

A Gaussian3D is described by a height, center, width, and two position angles.

The width of the Gaussian is now specified in terms of the full width at half maximum (FWHM), as with the 1D and 2D Gaussian functional classes.

The three axis values refer to the x, y, and z axes, and unlike with the 2D Gaussian any of the three axes may be the longest. Instead, the position angles are restricted: The first position angle, theta, is the longitudinal angle, referring to the rotation (counterclockwise) around the z-axis. The second, phi, is the latidudinal angle, referring to the rotation around the theta-rotated y axis. The domain of both angles is -pi/4 < A < pi/4. (Note that the use of theta and phi corresponds to the mathematical convention for these angles, not the physics convention.)

The parameter interface (see FunctionParam class), is used to provide an interface to the Fitting classes.

There are 9 parameters that are used to describe the Gaussian:

The height of the Gaussian. This is identical to the value returned using the height member function.
The center of the Gaussian in the x direction. This is identical to the value returned using the xCenter member function.
The center of the Gaussian in the y direction. This is identical to the value returned using the yCenter member function.
The center of the Gaussian in the z direction. This is identical to the value returned using the zCenter member function.
The width of the Gaussian along the x-axis.
The width of the Gaussian along the y-axis.
The width of the Gaussian along the z-axis.
The longitudinal position angle, theta (in radians)
The latitudinal position angle, phi (also in radians).

An enumeration for the H, CX, CY,CZ, AX, AY, AZ, THETA, PHI parameter index is provided, enabling the setting and reading of parameters with the [] operator. The mask() methods can be used to check and set the parameter masks.

This class is in general used implicitly by the Gaussian3D class only.

Tip: Other points to bear in mind when fitting this class to measured data are:

If you need to fit a circular Gaussian to data you should mask one or both position angles; This avoids rank deficiency in the fitting routines as the position angle is meaningless when the axes are equal;

Example

Gaussian3D<Double> g(9.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 0.0, 0.0);
Vector<Double> x(3);
x(0) = 1.0; x(1) = 0.5; x(2) = 0.0
cout << "g(" << x(0) << "," << x(1) << "," << x(2) << ")=" << g(x) << endl;

Template Type Argument Requirements (T)

T should have standard numerical operators and exp() function. Current implementation only tested for real types (and AutoDiff of them).

Thrown Exceptions

Assertion in debug mode if attempt is made to set a negative width
AipsError if incorrect parameter number specified.
others?

To Do

Gaussians that know about their DFT's could be required eventually.

Definition at line 149 of file Gaussian3DParam.h.

Member Enumeration Documentation

template<class Type>

anonymous enum

Parameter handling for the functional for 3D Gaussian Class.

Similar to Gaussian2DParam, but width parameters are not adjusted for FWHM; they are identical to the parameters used in the function.

Position angle parameters are restricted to -PI/4 < angle < PI/4.

Enumerator
H
CX
CY
CZ
AX
AY
AZ
THETA
PHI
NPAR

Definition at line 160 of file Gaussian3DParam.h.

Constructor & Destructor Documentation

template<class Type>

casacore::Gaussian3DParam< Type >::Gaussian3DParam ( )

Constructs the three dimensional Gaussians.

Defaults: height = 1, center = {0,0,0}, width = {1,1,1}, theta = phi = 0

template<class Type>

casacore::Gaussian3DParam< Type >::Gaussian3DParam	(	Type	height,
		const Vector< Type > &	center,
		const Vector< Type > &	width,
		Type	theta,
		Type	phi
	)

template<class Type>

casacore::Gaussian3DParam< Type >::Gaussian3DParam	(	Type &	height,
		Type &	xCenter,
		Type &	yCenter,
		Type &	zCenter,
		Type &	xWidth,
		Type &	yWidth,
		Type &	zWidth,
		Type &	theta,
		Type &	phi
	)

template<class Type>

casacore::Gaussian3DParam< Type >::Gaussian3DParam ( const Gaussian3DParam< Type > & other )

Copy construcor.

template<class Type>

template<class W >

casacore::Gaussian3DParam< Type >::Gaussian3DParam ( const Gaussian3DParam< W > & other )

inline

Definition at line 189 of file Gaussian3DParam.h.

template<class Type>

virtual casacore::Gaussian3DParam< Type >::~Gaussian3DParam ( )

virtual

Destructor.

Member Function Documentation

template<class Type>

Vector<Type> casacore::Gaussian3DParam< Type >::center ( ) const

Get or cet the center coordinates of the Gaussian.

template<class Type>

Type casacore::Gaussian3DParam< Type >::flux ( ) const

Get or set the total flux of the Gaussian.

(Note: Since this changes the height of the Gaussian but not its width, always set the width before setting the flux.)

template<class Type>

Type casacore::Gaussian3DParam< Type >::height ( ) const

Get or set the peak height of the Gaussian.

template<class Type>

virtual const String& casacore::Gaussian3DParam< Type >::name ( ) const

inlinevirtual

Give name of function.

Reimplemented from casacore::Function< Type >.

Definition at line 202 of file Gaussian3DParam.h.

template<class Type>

virtual uInt casacore::Gaussian3DParam< Type >::ndim ( ) const

inlinevirtual

Return dimensionality.

Implements casacore::Function< Type >.

Definition at line 206 of file Gaussian3DParam.h.

template<class Type>

Gaussian3DParam<Type>& casacore::Gaussian3DParam< Type >::operator= ( const Gaussian3DParam< Type > & other )

Copy assignment.

template<class Type>

Type casacore::Gaussian3DParam< Type >::phi ( ) const

template<class Type>

void casacore::Gaussian3DParam< Type >::setCenter ( const Vector< Type > & center )

template<class Type>

void casacore::Gaussian3DParam< Type >::setFlux ( const Type & flux )

template<class Type>

void casacore::Gaussian3DParam< Type >::setHeight ( const Type & height )

template<class Type>

void casacore::Gaussian3DParam< Type >::setphi ( const Type & sP )

template<class Type>

void casacore::Gaussian3DParam< Type >::settheta ( const Type & sT )

template<class Type>

void casacore::Gaussian3DParam< Type >::settrigvals ( ) const

protected

Referenced by casacore::Gaussian3DParam< T >::Gaussian3DParam().

template<class Type>

void casacore::Gaussian3DParam< Type >::setWidth ( const Vector< Type > & width )

template<class Type>

void casacore::Gaussian3DParam< Type >::setXcenter ( const Type & xcenter )

template<class Type>

void casacore::Gaussian3DParam< Type >::setXwidth ( const Type & xwidth )

template<class Type>

void casacore::Gaussian3DParam< Type >::setYcenter ( const Type & ycenter )

template<class Type>

void casacore::Gaussian3DParam< Type >::setYwidth ( const Type & ywidth )

template<class Type>

void casacore::Gaussian3DParam< Type >::setZcenter ( const Type & zcenter )

template<class Type>

void casacore::Gaussian3DParam< Type >::setZwidth ( const Type & zwidth )

template<class Type>

Type casacore::Gaussian3DParam< Type >::theta ( ) const

Get or set the rotation angles of the Gaussian.

Theta=logitude, phi=latitude

template<class Type>

Vector<Type> casacore::Gaussian3DParam< Type >::width ( ) const

Get or set the sigma-width of the Gaussian.

template<class Type>

Type casacore::Gaussian3DParam< Type >::xCenter ( ) const

template<class Type>

Type casacore::Gaussian3DParam< Type >::xWidth ( ) const

template<class Type>

Type casacore::Gaussian3DParam< Type >::yCenter ( ) const

template<class Type>

Type casacore::Gaussian3DParam< Type >::yWidth ( ) const

template<class Type>

Type casacore::Gaussian3DParam< Type >::zCenter ( ) const

template<class Type>

Type casacore::Gaussian3DParam< Type >::zWidth ( ) const

Member Data Documentation

template<class Type>

Type casacore::Gaussian3DParam< Type >::cosP_p

mutableprotected

Definition at line 264 of file Gaussian3DParam.h.

template<class Type>

Type casacore::Gaussian3DParam< Type >::cosT_p

mutableprotected

Definition at line 263 of file Gaussian3DParam.h.

template<class Type>

Type casacore::Gaussian3DParam< Type >::cosTcosP_p

mutableprotected

Definition at line 265 of file Gaussian3DParam.h.

template<class Type>

Type casacore::Gaussian3DParam< Type >::cosTsinP_p

mutableprotected

Definition at line 266 of file Gaussian3DParam.h.

template<class Type>

Type casacore::Gaussian3DParam< Type >::fwhm2int

protected

Definition at line 259 of file Gaussian3DParam.h.

template<class Type>

Type casacore::Gaussian3DParam< Type >::sinP_p

mutableprotected

Definition at line 264 of file Gaussian3DParam.h.

template<class Type>

Type casacore::Gaussian3DParam< Type >::sinT_p

mutableprotected

Definition at line 263 of file Gaussian3DParam.h.

template<class Type>

Type casacore::Gaussian3DParam< Type >::sinTcosP_p

mutableprotected

Definition at line 267 of file Gaussian3DParam.h.

template<class Type>

Type casacore::Gaussian3DParam< Type >::sinTsinP_p

mutableprotected

Definition at line 268 of file Gaussian3DParam.h.

template<class Type>

Type casacore::Gaussian3DParam< Type >::stoP_p

mutableprotected

Definition at line 262 of file Gaussian3DParam.h.

template<class Type>

Type casacore::Gaussian3DParam< Type >::stoT_p

mutableprotected

Definition at line 261 of file Gaussian3DParam.h.

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

casa/casacore/scimath/Functionals/Gaussian3DParam.h

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

template<class Type> class casacore::Gaussian3DParam< Type >

Intended use:

Review Status

Prerequisite

Etymology

Synopsis

Example

Template Type Argument Requirements (T)

Thrown Exceptions

To Do

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

template<class Type>
class casacore::Gaussian3DParam< Type >