org.rosuda.JRclient
Class RFactor

java.lang.Object
  org.rosuda.JRclient.RFactor

public class RFactor
extends java.lang.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 2746 2007-05-10 17:14:14Z urbanek $

Constructor Summary

RFactor()
create a new, empty factor var

RFactor(int[] i, java.lang.String[] v)
create a new factor variable, based on the supplied arrays.

RFactor(int[] i, java.util.Vector v)
special constructor used by REXP parser to save some re-indexing and performing automatic index conversion

Method Summary

void	add(java.lang.String v) add a new element (by name)
java.lang.String	at(int i) returns name for a specific ID
int	size() returns the number of caes
java.lang.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,
               java.lang.String[] v)

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

Parameters:

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

v - values - cotegory names

RFactor

public RFactor(int[] i,
               java.util.Vector v)

special constructor used by REXP parser to save some re-indexing and performing automatic index conversion

Parameters:

i - index array

v - vector of xpressions which should be all strings

Method Detail

add

public void add(java.lang.String v)

add a new element (by name)

Parameters:

v - value

at

public java.lang.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 java.lang.String toString()

displayable representation of the factor variable

Overrides:

toString in class java.lang.Object