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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 15:27:05 NZDT 2005 --><TITLE>RuleItem</TITLE><META NAME="keywords" CONTENT="weka.associations.RuleItem class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="RuleItem";}</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 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../Tutorial.pdf"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="http://www.cs.waikato.ac.nz/ml/weka/index.html"><FONT CLASS="NavBarFont1"><B>Weka's home</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../weka/associations/RuleGeneration.html" title="class in weka.associations"><B>PREV CLASS</B></A> <A HREF="../../weka/associations/Tertius.html" title="class in weka.associations"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="RuleItem.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" 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.associations</FONT><BR>Class RuleItem</H2><PRE>java.lang.Object <IMG SRC="../../resources/inherit.gif" ALT="extended by"><B>weka.associations.RuleItem</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>java.lang.Comparable, java.io.Serializable</DD></DL><HR><DL><DT>public class <B>RuleItem</B><DT>extends java.lang.Object<DT>implements java.lang.Comparable, java.io.Serializable</DL><P>Class for storing an (class) association rule. The premise and the consequence are stored each as separate item sets. For every rule their expected predictive accuracy and the time of generation is stored. These two measures allow to introduce a sort order for rules.<P><P><DL><DT><B>Version:</B></DT> <DD>1.0 $</DD><DT><B>Author:</B></DT> <DD>Stefan Mutter</DD><DT><B>See Also:</B><DD><A HREF="../../serialized-form.html#weka.associations.RuleItem">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/associations/RuleItem.html#RuleItem()">RuleItem</A></B>()</CODE><BR> Constructor for an empty RuleItem</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../weka/associations/RuleItem.html#RuleItem(weka.associations.ItemSet, weka.associations.ItemSet, int, int, double[], java.util.Hashtable)">RuleItem</A></B>(<A HREF="../../weka/associations/ItemSet.html" title="class in weka.associations">ItemSet</A> premise, <A HREF="../../weka/associations/ItemSet.html" title="class in weka.associations">ItemSet</A> consequence, int genTime, int ruleSupport, double[] m_midPoints, java.util.Hashtable m_priors)</CODE><BR> Constructor</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../weka/associations/RuleItem.html#RuleItem(weka.associations.RuleItem)">RuleItem</A></B>(<A HREF="../../weka/associations/RuleItem.html" title="class in weka.associations">RuleItem</A> toCopy)</CODE><BR> Constructor that generates a RuleItem out of a given one</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> double</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/associations/RuleItem.html#accuracy()">accuracy</A></B>()</CODE><BR> Gets the expected predictive accuracy of a rule</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/associations/RuleItem.html#compareTo(java.lang.Object)">compareTo</A></B>(java.lang.Object o)</CODE><BR> compares two RuleItems and allows an ordering concerning expected predictive accuracy and time of generation Note: this class has a natural ordering that is inconsistent with equals</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../weka/associations/ItemSet.html" title="class in weka.associations">ItemSet</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/associations/RuleItem.html#consequence()">consequence</A></B>()</CODE><BR> Gets the consequence of a rule</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/associations/RuleItem.html#equals(java.lang.Object)">equals</A></B>(java.lang.Object o)</CODE><BR> returns whether two RuleItems are equal</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../weka/associations/RuleItem.html" title="class in weka.associations">RuleItem</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/associations/RuleItem.html#generateRuleItem(weka.associations.ItemSet, weka.associations.ItemSet, weka.core.Instances, int, int, double[], java.util.Hashtable)">generateRuleItem</A></B>(<A HREF="../../weka/associations/ItemSet.html" title="class in weka.associations">ItemSet</A> premise, <A HREF="../../weka/associations/ItemSet.html" title="class in weka.associations">ItemSet</A> consequence, <A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> instances, int genTime, int minRuleCount, double[] m_midPoints, java.util.Hashtable m_priors)</CODE><BR> Constructs a new RuleItem if the support of the given rule is above the support threshold.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../weka/associations/ItemSet.html" title="class in weka.associations">ItemSet</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/associations/RuleItem.html#premise()">premise</A></B>()</CODE><BR> Gets the premise of a rule</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>getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD></TR></TABLE> <P>⌨️ 快捷键说明
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