iitb.CRF
Class CrfParams

java.lang.Object
  iitb.CRF.CrfParams

public class CrfParams

extends java.lang.Object

This class holds all parameters to control various aspects of the CRF model

Author:

Sunita Sarawagi

Field Summary

int	debugLvl
boolean	doScaling
double	epsForConvergence Convergence criteria for finding optimum lambda using BFGS
double	initValue initial value for all the lambda arrays
double	invSigmaSquare penalty term for likelihood function is ||lambda||^2*invSigmaSquare/2 set this to zero, if no penalty needed
int	maxIters Maximum number of iterations over the training data during training
int	mForHessian The number of corrections used in the BFGS update.
java.lang.String	trainerType

Constructor Summary

CrfParams()
constructor with default values as follows.

CrfParams(java.util.Properties opts)

CrfParams(java.lang.String args)
Initialize any parameter using space separated list of name value pairs Example: "initValue 0.1 maxIters 20" will set the initValue param to 0.1 and maxIters param to 20.

Methods inherited from class java.lang.Object

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

Field Detail

initValue

public double initValue

initial value for all the lambda arrays

invSigmaSquare

public double invSigmaSquare

penalty term for likelihood function is ||lambda||^2*invSigmaSquare/2 set this to zero, if no penalty needed

maxIters

public int maxIters

Maximum number of iterations over the training data during training

epsForConvergence

public double epsForConvergence

Convergence criteria for finding optimum lambda using BFGS

mForHessian

public int mForHessian

The number of corrections used in the BFGS update.

trainerType

public java.lang.String trainerType

debugLvl

public int debugLvl

doScaling

public boolean doScaling

Constructor Detail

CrfParams

public CrfParams()

constructor with default values as follows. initValue = 0; invSigmaSquare = 1.0; maxIters = 50; epsForConvergence = 0.0001; mForHessian = 7; trainerType = ""; debugLvl = 1;

CrfParams

public CrfParams(java.lang.String args)

Initialize any parameter using space separated list of name value pairs Example: "initValue 0.1 maxIters 20" will set the initValue param to 0.1 and maxIters param to 20.

CrfParams

public CrfParams(java.util.Properties opts)