hep.aida.ref.fitter
Class InternalFitFunction

java.lang.Object
  hep.aida.ref.fitter.InternalFitFunction

All Implemented Interfaces:

IFunction

public class InternalFitFunction
extends Object
implements IFunction

Constructor Summary

InternalFitFunction(hep.aida.dev.IDevFitDataIterator dataIterator, IModelFunction func, IFitMethod fitMethod)

Method Summary

IAnnotation	annotation()
String	codeletString() String describing the metatype and implementation of the function.
int	dimension() Dimensionality of the domain space.
double[]	gradient(double[] x) Gradient of the function.
int	indexOfParameter(String name) Return -1 if parameter not found (name undefined).
boolean	isEqual(IFunction f) Compare if functions are the same.
String	normalizationParameter() Returns the name of the normalization parameter if the function has one.
int	numberOfParameters() Number of parameters.
double	parameter(String name)
String[]	parameterNames() Names of paramaters.
double[]	parameters() Retrieve current vector of parameters.
boolean	providesGradient() Determine whether function is able to compute gradient.
void	setParameter(String name, double x) Set parameter's value by name.
void	setParameters(double[] params) Set new vector of parameters.
void	setTitle(String str) Set the histogram title.
String	title() Get the Function's title.
double	value(double[] x) Scalar value of the function.
String	variableName(int i) Get the symbolic name of i-th variable.
String[]	variableNames() Get all the names in a vector.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

InternalFitFunction

public InternalFitFunction(hep.aida.dev.IDevFitDataIterator dataIterator,
                           IModelFunction func,
                           IFitMethod fitMethod)

Method Detail

dimension

public int dimension()

Description copied from interface: IFunction

Dimensionality of the domain space.

Specified by:

dimension in interface IFunction

value

public double value(double[] x)

Description copied from interface: IFunction

Scalar value of the function.

Specified by:

value in interface IFunction

providesGradient

public boolean providesGradient()

Description copied from interface: IFunction

Determine whether function is able to compute gradient.

Specified by:

providesGradient in interface IFunction

variableName

public String variableName(int i)

Description copied from interface: IFunction

Get the symbolic name of i-th variable.

Specified by:

variableName in interface IFunction

variableNames

public String[] variableNames()

Description copied from interface: IFunction

Get all the names in a vector.

Specified by:

variableNames in interface IFunction

numberOfParameters

public int numberOfParameters()

Description copied from interface: IFunction

Number of parameters.

Specified by:

numberOfParameters in interface IFunction

gradient

public double[] gradient(double[] x)

Description copied from interface: IFunction

Gradient of the function. The result is valid only if providesGradient()==true. Otherwise the result is some default (empty) vector.

Specified by:

gradient in interface IFunction

isEqual

public boolean isEqual(IFunction f)

Description copied from interface: IFunction

Compare if functions are the same. PENDING: define exactly what it means ;)

Specified by:

isEqual in interface IFunction

annotation

public IAnnotation annotation()

Specified by:

annotation in interface IFunction

codeletString

public String codeletString()

Description copied from interface: IFunction

String describing the metatype and implementation of the function. Generic format of the string: codelet:TYPE:LOCATION TYPE part contains only a 'typename' string which is a metatype identifier (used in plugins and catalogues) LOCATION may be: 'file', 'verbatim', or 'catalogue' Detailed description: codelet:typename - no location specified (using 'catalogue') codelet:typename:file:/filename.cpp - a c++ source file codelet:typename:file:/filename.py - a python source file codelet:typename:file:/filename.so - a shared library codelet:typename:catalogue - entry in a catalogue repository codelet:typename:verbatim:cpp \n - c++ source file included verbatim after \n codelet:typename:verbatim:py \n - python source file included verbatim aftern \n Comments: file:/filename is a relative path to $AIDA_FUNCTION_DEFAULT_DIR file://filename is an absolute path Examples: codelet:G:catalogue codelet:userSinus:verbatim:cpp \n { return sin(x); }

Specified by:

codeletString in interface IFunction

setParameters

public void setParameters(double[] params)

Description copied from interface: IFunction

Set new vector of parameters.

Specified by:

setParameters in interface IFunction

parameters

public double[] parameters()

Description copied from interface: IFunction

Retrieve current vector of parameters.

Specified by:

parameters in interface IFunction

indexOfParameter

public int indexOfParameter(String name)

Description copied from interface: IFunction

Return -1 if parameter not found (name undefined). Leave it because there are use cases - some users prefer to use numbers.

Specified by:

indexOfParameter in interface IFunction

parameterNames

public String[] parameterNames()

Description copied from interface: IFunction

Names of paramaters. Names should be unique. Case-insensitive for comparison. Case-sensitive for storage and output. All or several names may be left blank "" if the implementation does not want to provide them.

Specified by:

parameterNames in interface IFunction

setParameter

public void setParameter(String name,
                         double x)

Description copied from interface: IFunction

Set parameter's value by name.

Specified by:

setParameter in interface IFunction

Parameters:

name - The name of the parameter.

x - The new value of the parameter.

parameter

public double parameter(String name)

Specified by:

parameter in interface IFunction

setTitle

public void setTitle(String str)

Description copied from interface: IFunction

Set the histogram title.

Specified by:

setTitle in interface IFunction

Parameters:

str - The title.

title

public String title()

Description copied from interface: IFunction

Get the Function's title.

Specified by:

title in interface IFunction

Returns:

The Function's title.

normalizationParameter

public String normalizationParameter()

Description copied from interface: IFunction

Returns the name of the normalization parameter if the function has one.

Specified by:

normalizationParameter in interface IFunction

Returns:

The name of the normalization parameter.null if no such parameter is available