casa::Sinusoid1DParam< T > Class Template Reference

Parameter handling for one dimensional Sinusoid class. More...

#include <Sinusoid1DParam.h>

Inheritance diagram for casa::Sinusoid1DParam< T >:

List of all members.

Public Types
enum	{   AMPLITUDE,   PERIOD,   X0 }
	Parameter numbers. More...
Public Member Functions
	Sinusoid1DParam ()
	Constructs the Sinusoids, Defaults: amplitude=1, period==1, x0=0.
	Sinusoid1DParam (const T &amplitude)
	Sinusoid1DParam (const T &amplitude, const T &period)
	Sinusoid1DParam (const T &amplitude, const T &period, const T &x0)
	Sinusoid1DParam (const Sinusoid1DParam &other)
	Copy constructor (deep copy)
template<class W >
	Sinusoid1DParam (const Sinusoid1DParam< W > &other)
Sinusoid1DParam< T > &	operator= (const Sinusoid1DParam< T > &other)
	Copy assignment (deep copy)
virtual	~Sinusoid1DParam ()
	Destructor.
virtual const String &	name () const
	Give name of function.
T	amplitude () const
	Get or set the amplitude of the Sinusoid.
void	setAmplitude (const T &amplitude)
T	x0 () const
	Get or set the x0 of the Sinusoid, the location of a peak.
void	setX0 (const T &x0)
T	period () const
	Get or set the period of the Sinusoid in full cycles.
void	setPeriod (const T &period)

---

Detailed Description

template<class T>
class casa::Sinusoid1DParam< T >

Parameter handling for one dimensional Sinusoid class.

Intended use:

Internal

Review Status

Reviewed By:

UNKNOWN

Date Reviewed:

before2004/08/25

Test programs:

tSinusoid1D

Prerequisite

• FunctionParam class
• Function1D class

Etymology

A 1-dimensional sinusoid's parameters.

Synopsis

A Sinusoid1D is described by an amplitude, a period, and a location of a peak. The parameters (amplitude, period, and x0) may be changed at run time.

The functional form is A*cos(2*pi(x-x0)/P)

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

There are 3 parameters that are used to describe the Sinusoid:

1. The amplitude of the Sinusoid. This is the value returned using the amplitude member function.
2. The period of the Sinusoid in the x direction. This is the value returned using the period member function. The period is expressed in full cycles.
3. The location of a peak of the Sinusoid (i.e. where x=pi+k.2pi)

An enumeration for the AMPLITUDE, PERIOD and X0 parameter index is provided.

This class is in general used implicitly by the Sinusoid1D class only.

Example

       Sinusoid1D<Double> sf(5.0, 25.0, 7);
       sf(25);            // = -4.911
       sf.setAmplitude(1.0);
       sf[Sinusoid1D<Double>::PERIOD] = 2.0;                
       sf.setX0(0.0);
       sf(0.5);             // = 1.0

Template Type Argument Requirements (T)

• T should have standard numerical operators and exp() function. Current implementation only tested for real types (and their AutoDiffs).

Thrown Exceptions

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

Definition at line 109 of file Sinusoid1DParam.h.

---

Member Enumeration Documentation

template<class T>

anonymous enum

Parameter numbers.

Enumerator:

AMPLITUDE
PERIOD
X0

Definition at line 114 of file Sinusoid1DParam.h.

---

Constructor & Destructor Documentation

template<class T>

casa::Sinusoid1DParam< T >::Sinusoid1DParam

(

)

Constructs the Sinusoids, Defaults: amplitude=1, period==1, x0=0.

I.e. a cosinusoid with cos(x).
Warning: Could not use default arguments that worked both with gcc and IRIX

template<class T>

casa::Sinusoid1DParam< T >::Sinusoid1DParam

(

const T &

amplitude

)

[explicit]

template<class T>

casa::Sinusoid1DParam< T >::Sinusoid1DParam	(	const T &	amplitude,
		const T &	period
	)

template<class T>

casa::Sinusoid1DParam< T >::Sinusoid1DParam	(	const T &	amplitude,
		const T &	period,
		const T &	x0
	)

template<class T>

casa::Sinusoid1DParam< T >::Sinusoid1DParam

(

const Sinusoid1DParam< T > &

other

)

Copy constructor (deep copy)

template<class T>

template<class W >

casa::Sinusoid1DParam< T >::Sinusoid1DParam

(

const Sinusoid1DParam< W > &

other

)

[inline]

Definition at line 132 of file Sinusoid1DParam.h.

template<class T>

virtual casa::Sinusoid1DParam< T >::~Sinusoid1DParam

(

)

[virtual]

Destructor.

---

Member Function Documentation

template<class T>

T casa::Sinusoid1DParam< T >::amplitude

(

)

const [inline]

Get or set the amplitude of the Sinusoid.

Definition at line 151 of file Sinusoid1DParam.h.

Referenced by casa::Sinusoid1DParam< AutoDiff< T > >::setAmplitude().

template<class T>

virtual const String& casa::Sinusoid1DParam< T >::name

(

)

const [inline, virtual]

Give name of function.

Reimplemented from casa::Function< T, T >.

Definition at line 146 of file Sinusoid1DParam.h.

template<class T>

Sinusoid1DParam<T>& casa::Sinusoid1DParam< T >::operator=

(

const Sinusoid1DParam< T > &

other

)

Copy assignment (deep copy)

template<class T>

T casa::Sinusoid1DParam< T >::period

(

)

const [inline]

Get or set the period of the Sinusoid in full cycles.

Definition at line 163 of file Sinusoid1DParam.h.

Referenced by casa::Sinusoid1DParam< AutoDiff< T > >::setPeriod().

template<class T>

void casa::Sinusoid1DParam< T >::setAmplitude

(

const T &

amplitude

)

[inline]

Definition at line 152 of file Sinusoid1DParam.h.

template<class T>

void casa::Sinusoid1DParam< T >::setPeriod

(

const T &

period

)

[inline]

Definition at line 164 of file Sinusoid1DParam.h.

template<class T>

void casa::Sinusoid1DParam< T >::setX0

(

const T &

x0

)

[inline]

Definition at line 158 of file Sinusoid1DParam.h.

template<class T>

T casa::Sinusoid1DParam< T >::x0

(

)

const [inline]

Get or set the x0 of the Sinusoid, the location of a peak.

Definition at line 157 of file Sinusoid1DParam.h.

Referenced by casa::Sinusoid1DParam< AutoDiff< T > >::setX0().

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

• casacore/scimath/Functionals/Sinusoid1DParam.h