abstractstringdistancefunction.html

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<TD><CODE><B><A HREF="../../weka/core/AbstractStringDistanceFunction.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>&nbsp;first,
         <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A>&nbsp;second,
         double&nbsp;cutOffValue,
         <A HREF="../../weka/core/neighboursearch/PerformanceStats.html" title="class in weka.core.neighboursearch">PerformanceStats</A>&nbsp;stats)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Calculates the distance between two instances.</TD>
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&nbsp;<A NAME="methods_inherited_from_class_weka.core.NormalizableDistance"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class weka.core.<A HREF="../../weka/core/NormalizableDistance.html" title="class in weka.core">NormalizableDistance</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../weka/core/NormalizableDistance.html#attributeIndicesTipText()">attributeIndicesTipText</A>, <A HREF="../../weka/core/NormalizableDistance.html#distance(weka.core.Instance, weka.core.Instance)">distance</A>, <A HREF="../../weka/core/NormalizableDistance.html#distance(weka.core.Instance, weka.core.Instance, double)">distance</A>, <A HREF="../../weka/core/NormalizableDistance.html#distance(weka.core.Instance, weka.core.Instance, weka.core.neighboursearch.PerformanceStats)">distance</A>, <A HREF="../../weka/core/NormalizableDistance.html#dontNormalizeTipText()">dontNormalizeTipText</A>, <A HREF="../../weka/core/NormalizableDistance.html#getAttributeIndices()">getAttributeIndices</A>, <A HREF="../../weka/core/NormalizableDistance.html#getDontNormalize()">getDontNormalize</A>, <A HREF="../../weka/core/NormalizableDistance.html#getInstances()">getInstances</A>, <A HREF="../../weka/core/NormalizableDistance.html#getInvertSelection()">getInvertSelection</A>, <A HREF="../../weka/core/NormalizableDistance.html#getOptions()">getOptions</A>, <A HREF="../../weka/core/NormalizableDistance.html#getRanges()">getRanges</A>, <A HREF="../../weka/core/NormalizableDistance.html#globalInfo()">globalInfo</A>, <A HREF="../../weka/core/NormalizableDistance.html#initializeRanges()">initializeRanges</A>, <A HREF="../../weka/core/NormalizableDistance.html#initializeRanges(int[])">initializeRanges</A>, <A HREF="../../weka/core/NormalizableDistance.html#initializeRanges(int[], int, int)">initializeRanges</A>, <A HREF="../../weka/core/NormalizableDistance.html#initializeRangesEmpty(int, double[][])">initializeRangesEmpty</A>, <A HREF="../../weka/core/NormalizableDistance.html#inRanges(weka.core.Instance, double[][])">inRanges</A>, <A HREF="../../weka/core/NormalizableDistance.html#invertSelectionTipText()">invertSelectionTipText</A>, <A HREF="../../weka/core/NormalizableDistance.html#listOptions()">listOptions</A>, <A HREF="../../weka/core/NormalizableDistance.html#postProcessDistances(double[])">postProcessDistances</A>, <A HREF="../../weka/core/NormalizableDistance.html#rangesSet()">rangesSet</A>, <A HREF="../../weka/core/NormalizableDistance.html#setAttributeIndices(java.lang.String)">setAttributeIndices</A>, <A HREF="../../weka/core/NormalizableDistance.html#setDontNormalize(boolean)">setDontNormalize</A>, <A HREF="../../weka/core/NormalizableDistance.html#setInstances(weka.core.Instances)">setInstances</A>, <A HREF="../../weka/core/NormalizableDistance.html#setInvertSelection(boolean)">setInvertSelection</A>, <A HREF="../../weka/core/NormalizableDistance.html#setOptions(java.lang.String[])">setOptions</A>, <A HREF="../../weka/core/NormalizableDistance.html#toString()">toString</A>, <A HREF="../../weka/core/NormalizableDistance.html#update(weka.core.Instance)">update</A>, <A HREF="../../weka/core/NormalizableDistance.html#updateRanges(weka.core.Instance)">updateRanges</A>, <A HREF="../../weka/core/NormalizableDistance.html#updateRanges(weka.core.Instance, double[][])">updateRanges</A>, <A HREF="../../weka/core/NormalizableDistance.html#updateRanges(weka.core.Instance, int, double[][])">updateRanges</A>, <A HREF="../../weka/core/NormalizableDistance.html#updateRangesFirst(weka.core.Instance, int, double[][])">updateRangesFirst</A></CODE></TD>
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
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<TD><CODE>equals, getClass, hashCode, notify, notifyAll, wait, wait, wait</CODE></TD>
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<TH ALIGN="left"><B>Methods inherited from interface weka.core.<A HREF="../../weka/core/RevisionHandler.html" title="interface in weka.core">RevisionHandler</A></B></TH>
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<TD><CODE><A HREF="../../weka/core/RevisionHandler.html#getRevision()">getRevision</A></CODE></TD>
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<A NAME="AbstractStringDistanceFunction()"><!-- --></A><H3>
AbstractStringDistanceFunction</H3>
<PRE>
public <B>AbstractStringDistanceFunction</B>()</PRE>
<DL>
<DD>Constructor that doesn't set the data
<P>
</DL>
<HR>

<A NAME="AbstractStringDistanceFunction(weka.core.Instances)"><!-- --></A><H3>
AbstractStringDistanceFunction</H3>
<PRE>
public <B>AbstractStringDistanceFunction</B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;data)</PRE>
<DL>
<DD>Constructor that sets the data
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>data</CODE> - the set of instances that will be used for
 later distance comparisons</DL>
</DL>

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<A NAME="distance(weka.core.Instance, weka.core.Instance, double, weka.core.neighboursearch.PerformanceStats)"><!-- --></A><H3>
distance</H3>
<PRE>
public double <B>distance</B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A>&nbsp;first,
                       <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A>&nbsp;second,
                       double&nbsp;cutOffValue,
                       <A HREF="../../weka/core/neighboursearch/PerformanceStats.html" title="class in weka.core.neighboursearch">PerformanceStats</A>&nbsp;stats)</PRE>
<DL>
<DD>Calculates the distance between two instances. Offers speed up (if the 
 distance function class in use supports it) in nearest neighbour search by 
 taking into account the cutOff or maximum distance. Depending on the 
 distance function class, post processing of the distances by 
 postProcessDistances(double []) may be required if this function is used.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../weka/core/DistanceFunction.html#distance(weka.core.Instance, weka.core.Instance, double, weka.core.neighboursearch.PerformanceStats)">distance</A></CODE> in interface <CODE><A HREF="../../weka/core/DistanceFunction.html" title="interface in weka.core">DistanceFunction</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/core/NormalizableDistance.html#distance(weka.core.Instance, weka.core.Instance, double, weka.core.neighboursearch.PerformanceStats)">distance</A></CODE> in class <CODE><A HREF="../../weka/core/NormalizableDistance.html" title="class in weka.core">NormalizableDistance</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>first</CODE> - the first instance<DD><CODE>second</CODE> - the second instance<DD><CODE>cutOffValue</CODE> - If the distance being calculated becomes larger than 
                    cutOffValue then the rest of the calculation is 
                    discarded.<DD><CODE>stats</CODE> - the performance stats object
<DT><B>Returns:</B><DD>the distance between the two given instances or 
                        Double.POSITIVE_INFINITY if the distance being 
                        calculated becomes larger than cutOffValue.</DL>
</DD>
</DL>
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