#include <CombiFunction.h>

Public Member Functions
	CombiFunction ()
	The default constructor – no functions, no parameters, nothing, the function operator returns a 0.

	CombiFunction (const CombiFunction< T > &other)
	Make this object a (deep) copy of other.

	CombiFunction (const CombiFunction< T > &other, Bool)

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

template<class W >
	CombiFunction (const CombiFunction< W > &other, Bool)

CombiFunction< T > &	operator= (const CombiFunction< T > &other)
	Make this object a (deep) copy of other.

virtual	~CombiFunction ()
	Destructor.

virtual T	eval (typename Function< T >::FunctionArg x) const
	Evaluate the function at `x`.

virtual Function< T > *	clone () const
	Return a copy of this object from the heap.

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

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

Public Member Functions inherited from casacore::CombiParam< T >
	CombiParam ()
	The default constructor – no functions, no parameters, nothing, the function operator returns a 0.

	CombiParam (const CombiParam< T > &other)
	Make this object a (deep) copy of other.

	CombiParam (const CombiParam< T > &other, Bool)

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

template<class W >
	CombiParam (const CombiParam< W > &other, Bool)

CombiParam< T > &	operator= (const CombiParam< T > &other)
	Make this object a (deep) copy of other.

virtual	~CombiParam ()
	Destructor.

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

uInt	addFunction (const Function< T > &newFunction)
	Add a function.

uInt	nFunctions () const
	Return the total number of functions.

const Function< T > &	function (uInt which) const
	Return a reference to a specific Function in the combination.

const Function< T > &	function (uInt which)

virtual uInt	ndim () const
	Returns the dimension of functions in the linear combination.

Public Member Functions inherited from casacore::Function< T, U >
	Function ()
	Constructors.

	Function (const uInt n)

	Function (const Vector< T > &in)

	Function (const FunctionParam< T > &other)

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

virtual	~Function ()
	Destructor.

uInt	nparameters () const
	Returns the number of parameters.

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

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

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

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

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.

const Bool &	mask (const uInt n) const

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

FunctionParam< T > &	parameters ()

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

Bool	parsetp () const

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

void	unlockParam ()

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

virtual void	getMode (RecordInterface &mode) const

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

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

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

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

Additional Inherited Members
Public Types inherited from casacore::Function< T, U >
typedef FunctionTraits< T >::ArgType	ArgType

typedef const ArgType *	FunctionArg

Protected Attributes inherited from casacore::CombiParam< T >
uInt	ndim_p
	Number of dimensions of underlying functions.

PtrBlock< Function< T > * >	functionPtr_p
	Pointer to each added function.

Protected Attributes inherited from casacore::Function< T, U >
FunctionParam< T >	param_p
	The parameters and masks.

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

Bool	parset_p
	Indicate parameter written.

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

Detailed Description

template<class T>
class casacore::CombiFunction< T >

Form a linear combination of function objects.

Intended use:

Public interface

Review Status

Reviewed By:: UNKNOWN
Date Reviewed:: before2004/08/25
Test programs:: tCombiFunction

Prerequisite

Function class

Synopsis

Given N function objects, the class describes a linear combination of the form:

f(x) = a(0)*f(0)(x) + a(1)*f(1)(x) +... + a(N-1)*f(N-1)(x)

N

size_t N

Axis number.

Definition ArrayAccessor.h:51

where a = {a(n)} are parameters. If the combi function is used in a functional fitting process (see LinearFit) these parameters canm be solved for. In all aspects they behave as FunctionParam values.

Member functions are added with the addFunction() method.

Tip: Check CompoundFunction class for a combination of functions behaving as one object;

Example

In the following example a second order polynomial is built from 3 separate polynomials.

Polynomial<Double> constant(0); 
Polynomial<Double> linear(1); 
Polynomial<Double> square(2);
 
constant.setCoefficient(0, 1.0);   // 1
linear.setCoefficient(1, 1.0);     // x
square[2] = 1.0;     // x^2
 
CombiFunction<Double> combination;
 
// form function, e0 + e1*x + e2*x^2
combination.addFunction(constant);
combination.addFunction(linear);
combination.addFunction(square);

Template Type Argument Requirements (T)

T should have standard numerical operators and exp() function. Current implementation only tested for real types.
To obtain derivatives, the derivatives should be defined.

Thrown Exceptions

AipsError in debug mode if incorrect function index

Motivation

This class was created to allow specialization of the evaluation in a simple way.

To Do

Nothing I know of

Definition at line 111 of file CombiFunction.h.

Constructor & Destructor Documentation

◆ CombiFunction() [1/5]

template<class T >

casacore::CombiFunction< T >::CombiFunction ( )

inline

The default constructor – no functions, no parameters, nothing, the function operator returns a 0.

Definition at line 116 of file CombiFunction.h.

◆ CombiFunction() [2/5]

template<class T >

casacore::CombiFunction< T >::CombiFunction ( const CombiFunction< T > & other )

inline

Make this object a (deep) copy of other.

Definition at line 119 of file CombiFunction.h.

◆ CombiFunction() [3/5]

template<class T >

casacore::CombiFunction< T >::CombiFunction	(	const CombiFunction< T > &	other,
		Bool
	)

inline

Definition at line 121 of file CombiFunction.h.

◆ CombiFunction() [4/5]

template<class T >

template<class W >

casacore::CombiFunction< T >::CombiFunction ( const CombiFunction< W > & other )

inline

Definition at line 124 of file CombiFunction.h.

◆ CombiFunction() [5/5]

template<class T >

template<class W >

casacore::CombiFunction< T >::CombiFunction	(	const CombiFunction< W > &	other,
		Bool
	)

inline

Definition at line 126 of file CombiFunction.h.

◆ ~CombiFunction()

template<class T >

virtual casacore::CombiFunction< T >::~CombiFunction ( )

inlinevirtual

Destructor.

Definition at line 134 of file CombiFunction.h.

Member Function Documentation

◆ clone()

template<class T >

virtual Function< T > * casacore::CombiFunction< T >::clone ( ) const

inlinevirtual

Return a copy of this object from the heap.

The caller is responsible for deleting the pointer.

Implements casacore::Function< T, U >.

Definition at line 144 of file CombiFunction.h.

◆ cloneAD()

template<class T >

virtual Function< typename FunctionTraits< T >::DiffType > * casacore::CombiFunction< T >::cloneAD ( ) const

inlinevirtual

Reimplemented from casacore::Function< T, U >.

Definition at line 145 of file CombiFunction.h.

◆ cloneNonAD()

template<class T >

virtual Function< typename FunctionTraits< T >::BaseType > * casacore::CombiFunction< T >::cloneNonAD ( ) const

inlinevirtual

Reimplemented from casacore::Function< T, U >.

Definition at line 147 of file CombiFunction.h.

References casacore::True.

◆ eval()

template<class T >

virtual T casacore::CombiFunction< T >::eval ( typename Function< T >::FunctionArg x ) const

virtual

Evaluate the function at x.

◆ operator=()

template<class T >

CombiFunction< T > & casacore::CombiFunction< T >::operator= ( const CombiFunction< T > & other )

inline

Make this object a (deep) copy of other.

Definition at line 130 of file CombiFunction.h.

References casacore::CombiParam< T >::operator=().

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

scimath/Functionals/CombiFunction.h

Public Member Functions

Additional Inherited Members

Detailed Description

Intended use:

Review Status

Prerequisite

Synopsis

Example

Template Type Argument Requirements (T)

Thrown Exceptions

Motivation

To Do

Constructor & Destructor Documentation

◆ CombiFunction() [1/5]

◆ CombiFunction() [2/5]

◆ CombiFunction() [3/5]

◆ CombiFunction() [4/5]

◆ CombiFunction() [5/5]

◆ ~CombiFunction()

Member Function Documentation

◆ clone()

◆ cloneAD()

◆ cloneNonAD()

◆ eval()

◆ operator=()