Package edu.stanford.nlp.ie.crf

Class CRFNonLinearLogConditionalObjectiveFunction

java.lang.Object

edu.stanford.nlp.optimization.AbstractCachingDiffFunction

edu.stanford.nlp.ie.crf.CRFNonLinearLogConditionalObjectiveFunction

All Implemented Interfaces:

HasCliquePotentialFunction, DiffFunction, Function, HasFeatureGrouping, HasInitial, HasRegularizerParamRange

public class CRFNonLinearLogConditionalObjectiveFunction
extends AbstractCachingDiffFunction
implements HasCliquePotentialFunction, HasFeatureGrouping, HasRegularizerParamRange

Author:

Mengqiu Wang

Field Summary

Fields

Modifier and Type	Field	Description
static boolean	DEBUG
protected double	epsilon
boolean	gradientsOnly
static int	HUBER_PRIOR
static int	L1_PRIOR
static int	NO_PRIOR
protected int	prior
static int	QUADRATIC_PRIOR
static int	QUARTIC_PRIOR
protected double	sigma
static boolean	VERBOSE

Fields inherited from class edu.stanford.nlp.optimization.AbstractCachingDiffFunction

derivative, value

Method Summary

Modifier and Type	Method	Description
void	calculate(double[] x)	Calculates both value and partial derivatives at the point x, and save them internally.
int	domainDimension()	Returns the number of dimensions in the function's domain
double[][]	empty2D()
double[][]	emptyFull2D()
CliquePotentialFunction	getCliquePotentialFunction(double[] x)
int[][]	getFeatureGrouping()
static int	getPriorType(String priorTypeStr)
Set<Integer>	getRegularizerParamRange(double[] x)
double[]	initial()	Returns the intitial point in the domain (but not necessarily a feasible one).
Triple<double[][],double[][],double[][]>	separateWeights(double[] x)
double[][]	to2D(double[] linearWeights)

Methods inherited from class edu.stanford.nlp.optimization.AbstractCachingDiffFunction

clearCache, copy, derivativeAt, ensure, getDerivative, gradientCheck, gradientCheck, lastValue, randomInitial, valueAt

Methods inherited from class java.lang.Object

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

Field Detail

NO_PRIOR

public static final int NO_PRIOR

See Also:

Constant Field Values

QUADRATIC_PRIOR

public static final int QUADRATIC_PRIOR

See Also:

Constant Field Values

HUBER_PRIOR

public static final int HUBER_PRIOR

See Also:

Constant Field Values

QUARTIC_PRIOR

public static final int QUARTIC_PRIOR

See Also:

Constant Field Values

L1_PRIOR

public static final int L1_PRIOR

See Also:

Constant Field Values

prior

protected int prior

sigma

protected double sigma

epsilon

protected double epsilon

VERBOSE

public static boolean VERBOSE

DEBUG

public static boolean DEBUG

gradientsOnly

public boolean gradientsOnly

Method Detail

getPriorType

public static int getPriorType(String priorTypeStr)

domainDimension

public int domainDimension()

Description copied from interface: Function

Returns the number of dimensions in the function's domain

Specified by:

domainDimension in interface Function

Returns:

the number of domain dimensions

initial

public double[] initial()

Description copied from interface: HasInitial

Returns the intitial point in the domain (but not necessarily a feasible one).

Specified by:

initial in interface HasInitial

Overrides:

initial in class AbstractCachingDiffFunction

Returns:

a domain point

separateWeights

public Triple<double[][],double[][],double[][]> separateWeights(double[] x)

getCliquePotentialFunction

public CliquePotentialFunction getCliquePotentialFunction(double[] x)

Specified by:

getCliquePotentialFunction in interface HasCliquePotentialFunction

calculate

public void calculate(double[] x)

Calculates both value and partial derivatives at the point x, and save them internally.

Specified by:

calculate in class AbstractCachingDiffFunction

Parameters:

x - The point at which to calculate the function

getRegularizerParamRange

public Set<Integer> getRegularizerParamRange(double[] x)

Specified by:

getRegularizerParamRange in interface HasRegularizerParamRange

to2D

public double[][] to2D(double[] linearWeights)

empty2D

public double[][] empty2D()

emptyFull2D

public double[][] emptyFull2D()

getFeatureGrouping

public int[][] getFeatureGrouping()

Specified by:

getFeatureGrouping in interface HasFeatureGrouping