com.itemanalysis.psychometrics.polycor

Class AbstractPolychoricCorrelation

java.lang.Object

com.itemanalysis.psychometrics.polycor.AbstractPolychoricCorrelation

All Implemented Interfaces:

PolychoricCorrelation

Direct Known Subclasses:

PolychoricTwoStep

public abstract class AbstractPolychoricCorrelation
extends java.lang.Object
implements PolychoricCorrelation

Field Summary

Fields

Modifier and Type	Field and Description
protected double[]	columnThresholds
protected double[][]	data
protected double	fmin
protected boolean	incremental
protected double	N
protected int	ncol
protected org.apache.commons.math3.distribution.NormalDistribution	norm
protected int	nrow
protected double	rho
protected double[]	rowThresholds
protected TwoWayTable	table

Constructor Summary

Constructors

Constructor and Description
AbstractPolychoricCorrelation()

Method Summary

Modifier and Type	Method and Description
protected double[]	cumulativeColumnSums()
protected double[]	cumulativeRowSums()
protected double[]	extractColumnThresholds(double[] par, boolean uncmin)
protected double	extractRho(double[] par, boolean uncmin)
protected double[]	extractRowThresholds(double[] par, boolean uncmin)
double[]	getColumnThresholds()
protected double[]	getParameterArray(double rho, double[] rc, double[] cc)
double[]	getRowThresholds()
void	increment(char x, char y)
void	increment(int x, int y)
void	increment(long x, long y)
protected void	initialize()
protected double	logLikelihood(double[] rowThresholds, double[] colThresholds, double rho)

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.itemanalysis.psychometrics.polycor.PolychoricCorrelation

print, value

Field Detail

data

protected double[][] data

nrow

protected int nrow

ncol

protected int ncol

N

protected double N

rowThresholds

protected double[] rowThresholds

columnThresholds

protected double[] columnThresholds

rho

protected double rho

fmin

protected double fmin

incremental

protected boolean incremental

table

protected TwoWayTable table

norm

protected org.apache.commons.math3.distribution.NormalDistribution norm

Constructor Detail

AbstractPolychoricCorrelation

public AbstractPolychoricCorrelation()

Method Detail

initialize

protected void initialize()

cumulativeRowSums

protected double[] cumulativeRowSums()

cumulativeColumnSums

protected double[] cumulativeColumnSums()

getParameterArray

protected double[] getParameterArray(double rho,
                                     double[] rc,
                                     double[] cc)

extractRho

protected double extractRho(double[] par,
                            boolean uncmin)

extractRowThresholds

protected double[] extractRowThresholds(double[] par,
                                        boolean uncmin)

extractColumnThresholds

protected double[] extractColumnThresholds(double[] par,
                                           boolean uncmin)

logLikelihood

protected double logLikelihood(double[] rowThresholds,
                               double[] colThresholds,
                               double rho)

getRowThresholds

public double[] getRowThresholds()

Specified by:

getRowThresholds in interface PolychoricCorrelation

getColumnThresholds

public double[] getColumnThresholds()

Specified by:

getColumnThresholds in interface PolychoricCorrelation

increment

public void increment(int x,
                      int y)

increment

public void increment(char x,
                      char y)

increment

public void increment(long x,
                      long y)