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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 1.5.0_13) on Tue Jul 15 15:48:44 NZST 2008 --><TITLE>DistanceFunction</TITLE><META NAME="keywords" CONTENT="weka.core.DistanceFunction interface"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="DistanceFunction";}</SCRIPT><NOSCRIPT></NOSCRIPT></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=2 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="../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="http://www.cs.waikato.ac.nz/ml/weka/" target="_blank"><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/core/Debug.Timestamp.html" title="class in weka.core"><B>PREV CLASS</B></A> <A HREF="../../weka/core/Drawable.html" title="interface in weka.core"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html?weka/core/DistanceFunction.html" target="_top"><B>FRAMES</B></A> <A HREF="DistanceFunction.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 | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <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.core</FONT><BR>Interface DistanceFunction</H2><DL><DT><B>All Superinterfaces:</B> <DD><A HREF="../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></DD></DL><DL><DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../weka/core/AbstractStringDistanceFunction.html" title="class in weka.core">AbstractStringDistanceFunction</A>, <A HREF="../../weka/core/ChebyshevDistance.html" title="class in weka.core">ChebyshevDistance</A>, <A HREF="../../weka/core/EditDistance.html" title="class in weka.core">EditDistance</A>, <A HREF="../../weka/core/EuclideanDistance.html" title="class in weka.core">EuclideanDistance</A>, <A HREF="../../weka/core/ManhattanDistance.html" title="class in weka.core">ManhattanDistance</A>, <A HREF="../../weka/core/NormalizableDistance.html" title="class in weka.core">NormalizableDistance</A></DD></DL><HR><DL><DT><PRE>public interface <B>DistanceFunction</B><DT>extends <A HREF="../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></DL></PRE><P>Interface for any class that can compute and return distances between two instances.<P><P><DL><DT><B>Version:</B></DT> <DD>$Revision: 1.7 $</DD><DT><B>Author:</B></DT> <DD>Ashraf M. Kibriya (amk14@cs.waikato.ac.nz)</DD></DL><HR><P><!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Method Summary</B></FONT></TH></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/core/DistanceFunction.html#distance(weka.core.Instance, weka.core.Instance)">distance</A></B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> first, <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> second)</CODE><BR> Calculates the distance between two instances.</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/core/DistanceFunction.html#distance(weka.core.Instance, weka.core.Instance, double)">distance</A></B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> first, <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> second, double cutOffValue)</CODE><BR> Calculates the distance between two instances.</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/core/DistanceFunction.html#distance(weka.core.Instance, weka.core.Instance, double, weka.core.neighboursearch.PerformanceStats)">distance</A></B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> first, <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> second, double cutOffValue, <A HREF="../../weka/core/neighboursearch/PerformanceStats.html" title="class in weka.core.neighboursearch">PerformanceStats</A> stats)</CODE><BR> Calculates the distance between two instances.</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/core/DistanceFunction.html#distance(weka.core.Instance, weka.core.Instance, weka.core.neighboursearch.PerformanceStats)">distance</A></B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> first, <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> second, <A HREF="../../weka/core/neighboursearch/PerformanceStats.html" title="class in weka.core.neighboursearch">PerformanceStats</A> stats)</CODE><BR> Calculates the distance between two instances.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.String</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/core/DistanceFunction.html#getAttributeIndices()">getAttributeIndices</A></B>()</CODE><BR> Gets the range of attributes used in the calculation of the distance.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/core/DistanceFunction.html#getInstances()">getInstances</A></B>()</CODE><BR> returns the instances currently set.</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/core/DistanceFunction.html#getInvertSelection()">getInvertSelection</A></B>()</CODE><BR> Gets whether the matching sense of attribute indices is inverted or not.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/core/DistanceFunction.html#postProcessDistances(double[])">postProcessDistances</A></B>(double[] distances)</CODE><BR> Does post processing of the distances (if necessary) returned by distance(distance(Instance first, Instance second, double cutOffValue).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/core/DistanceFunction.html#setAttributeIndices(java.lang.String)">setAttributeIndices</A></B>(java.lang.String value)</CODE><BR> Sets the range of attributes to use in the calculation of the distance.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/core/DistanceFunction.html#setInstances(weka.core.Instances)">setInstances</A></B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> insts)</CODE><BR> Sets the instances.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/core/DistanceFunction.html#setInvertSelection(boolean)">setInvertSelection</A></B>(boolean value)</CODE><BR> Sets whether the matching sense of attribute indices is inverted or not.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/core/DistanceFunction.html#update(weka.core.Instance)">update</A></B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> ins)</CODE><BR> Update the distance function (if necessary) for the newly added instance.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_weka.core.OptionHandler"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TH ALIGN="left"><B>Methods inherited from interface weka.core.<A HREF="../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></B></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../weka/core/OptionHandler.html#getOptions()">getOptions</A>, <A HREF="../../weka/core/OptionHandler.html#listOptions()">listOptions</A>, <A HREF="../../weka/core/OptionHandler.html#setOptions(java.lang.String[])">setOptions</A></CODE></TD></TR></TABLE> <P><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"><B>Method Detail</B></FONT></TH></TR></TABLE><A NAME="setInstances(weka.core.Instances)"><!-- --></A><H3>setInstances</H3><PRE>void <B>setInstances</B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> insts)</PRE><DL><DD>Sets the instances.<P><DD><DL></DL></DD><DD><DL><DT><B>Parameters:</B><DD><CODE>insts</CODE> - the instances to use</DL></DD></DL><HR><A NAME="getInstances()"><!-- --></A><H3>getInstances</H3><PRE><A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>getInstances</B>()</PRE><DL><DD>returns the instances currently set.⌨️ 快捷键说明
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