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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.4.2_05) on Mon Mar 07 15:27:10 NZDT 2005 --><TITLE>HoldOutSubsetEvaluator</TITLE><META NAME="keywords" CONTENT="weka.attributeSelection.HoldOutSubsetEvaluator class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="HoldOutSubsetEvaluator";}</SCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD 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CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">weka.attributeSelection</FONT><BR>Class HoldOutSubsetEvaluator</H2><PRE>java.lang.Object <IMG SRC="../../resources/inherit.gif" ALT="extended by"><A HREF="../../weka/attributeSelection/ASEvaluation.html" title="class in weka.attributeSelection">weka.attributeSelection.ASEvaluation</A> <IMG SRC="../../resources/inherit.gif" ALT="extended by"><A HREF="../../weka/attributeSelection/SubsetEvaluator.html" title="class in weka.attributeSelection">weka.attributeSelection.SubsetEvaluator</A> <IMG SRC="../../resources/inherit.gif" ALT="extended by"><B>weka.attributeSelection.HoldOutSubsetEvaluator</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>java.io.Serializable</DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../weka/attributeSelection/ClassifierSubsetEval.html" title="class in weka.attributeSelection">ClassifierSubsetEval</A></DD></DL><HR><DL><DT>public abstract class <B>HoldOutSubsetEvaluator</B><DT>extends <A HREF="../../weka/attributeSelection/SubsetEvaluator.html" title="class in weka.attributeSelection">SubsetEvaluator</A></DL><P>Abstract attribute subset evaluator capable of evaluating subsets with respect to a data set that is distinct from that used to initialize/ train the subset evaluator.<P><P><DL><DT><B>Version:</B></DT> <DD>$Revision: 1.3 $</DD><DT><B>Author:</B></DT> <DD>Mark Hall (mhall@cs.waikato.ac.nz)</DD><DT><B>See Also:</B><DD><A HREF="../../serialized-form.html#weka.attributeSelection.HoldOutSubsetEvaluator">Serialized Form</A></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../weka/attributeSelection/HoldOutSubsetEvaluator.html#HoldOutSubsetEvaluator()">HoldOutSubsetEvaluator</A></B>()</CODE><BR> </TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>abstract double</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/attributeSelection/HoldOutSubsetEvaluator.html#evaluateSubset(java.util.BitSet, weka.core.Instance, boolean)">evaluateSubset</A></B>(java.util.BitSet subset, <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> holdOut, boolean retrain)</CODE><BR> Evaluates a subset of attributes with respect to a single instance.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>abstract double</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/attributeSelection/HoldOutSubsetEvaluator.html#evaluateSubset(java.util.BitSet, weka.core.Instances)">evaluateSubset</A></B>(java.util.BitSet subset, <A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> holdOut)</CODE><BR> Evaluates a subset of attributes with respect to a set of instances.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_weka.attributeSelection.SubsetEvaluator"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class weka.attributeSelection.<A HREF="../../weka/attributeSelection/SubsetEvaluator.html" title="class in weka.attributeSelection">SubsetEvaluator</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../weka/attributeSelection/SubsetEvaluator.html#evaluateSubset(java.util.BitSet)">evaluateSubset</A></CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_weka.attributeSelection.ASEvaluation"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class weka.attributeSelection.<A HREF="../../weka/attributeSelection/ASEvaluation.html" title="class in weka.attributeSelection">ASEvaluation</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../weka/attributeSelection/ASEvaluation.html#buildEvaluator(weka.core.Instances)">buildEvaluator</A>, <A HREF="../../weka/attributeSelection/ASEvaluation.html#forName(java.lang.String, java.lang.String[])">forName</A>, <A HREF="../../weka/attributeSelection/ASEvaluation.html#makeCopies(weka.attributeSelection.ASEvaluation, int)">makeCopies</A>, <A HREF="../../weka/attributeSelection/ASEvaluation.html#postProcess(int[])">postProcess</A></CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.lang.Object</B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Constructor Detail</B></FONT></TD></TR></TABLE><A NAME="HoldOutSubsetEvaluator()"><!-- --></A><H3>HoldOutSubsetEvaluator</H3><PRE>public <B>HoldOutSubsetEvaluator</B>()</PRE><DL></DL><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Method Detail</B></FONT></TD></TR></TABLE><A NAME="evaluateSubset(java.util.BitSet, weka.core.Instances)"><!-- --></A><H3>evaluateSubset</H3><PRE>public abstract double <B>evaluateSubset</B>(java.util.BitSet subset, <A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> holdOut) throws java.lang.Exception</PRE><DL><DD>Evaluates a subset of attributes with respect to a set of instances.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>subset</CODE> - a bitset representing the attribute subset to be evaluated<DD><CODE>holdOut</CODE> - a set of instances (possibly seperate and distinct from those use to build/train the evaluator) with which to evaluate the merit of the subset<DT><B>Returns:</B><DD>the "merit" of the subset on the holdOut data<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if the subset cannot be evaluated</DL></DD></DL><HR><A NAME="evaluateSubset(java.util.BitSet, weka.core.Instance, boolean)"><!-- --></A><H3>evaluateSubset</H3><PRE>public abstract double <B>evaluateSubset</B>(java.util.BitSet subset, <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> holdOut, boolean retrain) throws java.lang.Exception</PRE><DL><DD>Evaluates a subset of attributes with respect to a single instance.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>subset</CODE> - a bitset representing the attribute subset to be evaluated<DD><CODE>holdOut</CODE> - a single instance (possibly not one of those used to build/train the evaluator) with which to evaluate the merit of the subset<DD><CODE>retrain</CODE> - true if the classifier should be retrained with respect to the new subset before testing on the holdOut instance.<DT><B>Returns:</B><DD>the "merit" of the subset on the holdOut instance<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if the subset cannot be evaluated</DL></DD></DL><!-- ========= END OF CLASS DATA ========= --><HR><!-- ======= START OF BOTTOM NAVBAR ====== --><A NAME="navbar_bottom"><!-- --></A><A HREF="#skip-navbar_bottom" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A 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