org.rosuda.JRI

Class RFactor

java.lang.Object

org.rosuda.JRI.RFactor

public class RFactor
extends Object

representation of a factor variable. In R there is no actual xpression type called "factor", instead it is coded as an int vector with a list attribute. The parser code of REXP converts such constructs directly into the RFactor objects and defines an own XT_FACTOR type

Version:

$Id: RFactor.java 2909 2008-07-15 15:06:49Z urbanek $

Constructor Summary

Constructors

Constructor and Description
RFactor() create a new, empty factor var
RFactor(int[] i, String[] v) create a new factor variable, based on the supplied arrays.

Method Summary

Modifier and Type	Method and Description
void	add(String v) add a new element (by name)
String	at(int i) returns name for a specific ID
int	size() returns the number of caes
String	toString() displayable representation of the factor variable

Methods inherited from class java.lang.Object

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

Constructor Detail

RFactor

public RFactor()

create a new, empty factor var

RFactor

public RFactor(int[] i,
               String[] v)

create a new factor variable, based on the supplied arrays.

Parameters:

i - array of IDs (0..v.length-1)

v - values - category names

Method Detail

add

public void add(String v)

add a new element (by name)

Parameters:

v - value

at

public String at(int i)

returns name for a specific ID

Parameters:

i - ID

Returns:

name. may throw exception if out of range

size

public int size()

returns the number of caes

toString

public String toString()

displayable representation of the factor variable

Overrides:

toString in class Object