casacore::ExpSincConv< T > Class Template Reference

Exponential times a Sinc. More...

#include <MathFunc.h>

Public Member Functions
	ExpSincConv (T cut=MathFunc< T >::defcutoff(), T sincparm=MathFunc< T >::defSincparm(), T exppow=MathFunc< T >::defExpPower(), T expscale=MathFunc< T >::defExpScale())
	default constructor
	ExpSincConv (const ExpSincConv< T > &)
	copy constructor
ExpSincConv< T > &	operator= (const ExpSincConv< T > &)
	assignment operator
T	sup_value () const
	get access to the support width
T	value (const T &) const
	and get the value of the function
FuncId	id () const
	return FuncID structure for Table storage/retrieval.
Public Member Functions inherited from casacore::MathFunc< T >
	MathFunc (FUNCTYPE)
	constructors
	MathFunc (FUNCTYPE, T cutoff, T arg1=1.0e+30, T arg2=1.0e+30, T arg3=1.0e+30)
	accept up to 4 arguments, the first being the support radius
	MathFunc (String &, Vector< double > &)
	MathFunc (const MathFunc< T > &)
	MathFunc (MathFunc< T > *)
virtual	~MathFunc ()
	Destructor.
MathFunc< T > &	operator= (const MathFunc< T > &)
	Assignment operator - Note: this function works only for envelops.

Private Member Functions
MathFunc< T > *	clone () const
	for every derived class, return new of that class with its own parameters

Private Attributes
T	sup_width
T	scale
T	exponent
T	sincpByPi

Additional Inherited Members
Static Public Member Functions inherited from casacore::MathFunc< T >
static MathFunc< T > *	newMathFunc (const MathFunc< T > &)
	create a new math function
static T	defcutoff ()
	These functions return the static constants used as default parameters for the various derived functions.
static T	defwidth ()
	The default width for Gaussian_Conv.
static T	defKBwidth ()
	The default width for KB_Conv and Mod_KB_Conv.
static T	defKBparm ()
	A default parameter for KB_Conv and Mod_KB_Conv.
static T	defmodKBparm ()
	A default parameter for Mod_KB_Conv.
static T	defSphcutoff ()
	The default support radius for Sinc_Conv and Sph_Conv.
static T	defSincparm ()
	The default Sinc parameter for Sinc_Conv and Exp_Sinc_Conv.
static T	defSphparm ()
	The default parameter for Sph_Conv.
static T	defExpPower ()
	The default exponential power for Exp_Sinc_Conv.
static T	defExpScale ()
	The default exponential scale length for Exp_Sinc_Conv.
Protected Member Functions inherited from casacore::MathFunc< T >
	MathFunc ()
	Default constructor (Null)
Protected Attributes inherited from casacore::MathFunc< T >
MathFunc< T > *	object
	pointer to letter class

Detailed Description

template<class T>
class casacore::ExpSincConv< T >

Exponential times a Sinc.

Synopsis

An Exponential times a Sinc

The value(T &x) is given by Exp(-(abs(x) / expscale) ** exppow) * Sinc(pi * x / sincparm)

where the 3 paramaters correspond to those in the default constructor Note that the default case of exppow = 2 is a Gaussian times a Sinc. Since this is often a useful case, that parameter appears last in the constructor.

Definition at line 503 of file MathFunc.h.

Constructor & Destructor Documentation

ExpSincConv() [1/2]

template<class T >

casacore::ExpSincConv< T >::ExpSincConv	(	T	cut = MathFunc< T >::defcutoff(),
		T	sincparm = MathFunc< T >::defSincparm(),
		T	exppow = MathFunc< T >::defExpPower(),
		T	expscale = MathFunc< T >::defExpScale()
	)

default constructor

ExpSincConv() [2/2]

template<class T >

casacore::ExpSincConv< T >::ExpSincConv

(

const ExpSincConv< T > &

)

copy constructor

Member Function Documentation

clone()

template<class T >

MathFunc< T > * casacore::ExpSincConv< T >::clone ( ) const

privatevirtual

for every derived class, return new of that class with its own parameters

Reimplemented from casacore::MathFunc< T >.

id()

template<class T >

FuncId casacore::ExpSincConv< T >::id ( ) const

virtual

return FuncID structure for Table storage/retrieval.

Reimplemented from casacore::MathFunc< T >.

operator=()

template<class T >

ExpSincConv< T > & casacore::ExpSincConv< T >::operator=

(

const ExpSincConv< T > &

)

assignment operator

sup_value()

template<class T >

T casacore::ExpSincConv< T >::sup_value ( ) const

inlinevirtual

get access to the support width

Reimplemented from casacore::MathFunc< T >.

Definition at line 520 of file MathFunc.h.

References casacore::ExpSincConv< T >::sup_width.

value()

template<class T >

T casacore::ExpSincConv< T >::value ( const T &  ) const

virtual

and get the value of the function

Reimplemented from casacore::MathFunc< T >.

Member Data Documentation

exponent

template<class T >

T casacore::ExpSincConv< T >::exponent

private

Definition at line 532 of file MathFunc.h.

scale

template<class T >

T casacore::ExpSincConv< T >::scale

private

Definition at line 532 of file MathFunc.h.

sincpByPi

template<class T >

T casacore::ExpSincConv< T >::sincpByPi

private

Definition at line 532 of file MathFunc.h.

sup_width

template<class T >

T casacore::ExpSincConv< T >::sup_width

private

Definition at line 532 of file MathFunc.h.

Referenced by casacore::ExpSincConv< T >::sup_value().

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

• scimath/Mathematics/MathFunc.h