com.itemanalysis.psychometrics.irt.estimation

Class IterationRecord

java.lang.Object

com.itemanalysis.psychometrics.irt.estimation.IterationRecord

public class IterationRecord
extends java.lang.Object

A class for storing the maximum change in logits and the log-likelihood at each iteration. This class is just for record keeping and displaying the history.

Constructor Summary

Constructors

Constructor and Description
IterationRecord(double delta, double loglikelihood) Each instance stores information about the iteration.

Method Summary

Modifier and Type	Method and Description
double	getDelta() Gets the maximum change in logits.
double	getLoglikelihood() Gets the log-likelihood.
java.lang.String	toString() A string for displaying results.

Methods inherited from class java.lang.Object

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

Constructor Detail

IterationRecord

public IterationRecord(double delta,
                       double loglikelihood)

Each instance stores information about the iteration.

Parameters:

delta - maximum change in logits.

loglikelihood - log-likelihood value.

Method Detail

getDelta

public double getDelta()

Gets the maximum change in logits.

Returns:

maximum change in lgits.

getLoglikelihood

public double getLoglikelihood()

Gets the log-likelihood.

Returns:

log-likelihood value.

toString

public java.lang.String toString()

A string for displaying results.

Overrides:

toString in class java.lang.Object

Returns:

value for this iteration.