cachedkernel.html

数据挖掘的最常用工具。由于开源

<B>Constructor Detail</B></FONT></TH>
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<A NAME="CachedKernel()"><!-- --></A><H3>
CachedKernel</H3>
<PRE>
public <B>CachedKernel</B>()</PRE>
<DL>
<DD>default constructor - does nothing.
<P>
</DL>

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<B>Method Detail</B></FONT></TH>
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<A NAME="listOptions()"><!-- --></A><H3>
listOptions</H3>
<PRE>
public java.util.Enumeration <B>listOptions</B>()</PRE>
<DL>
<DD>Returns an enumeration describing the available options.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../weka/core/OptionHandler.html#listOptions()">listOptions</A></CODE> in interface <CODE><A HREF="../../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html#listOptions()">listOptions</A></CODE> in class <CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html" title="class in weka.classifiers.functions.supportVector">Kernel</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>an enumeration of all the available options.</DL>
</DD>
</DL>
<HR>

<A NAME="setOptions(java.lang.String[])"><!-- --></A><H3>
setOptions</H3>
<PRE>
public void <B>setOptions</B>(java.lang.String[]&nbsp;options)
                throws java.lang.Exception</PRE>
<DL>
<DD>Parses a given list of options. <p/>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../weka/core/OptionHandler.html#setOptions(java.lang.String[])">setOptions</A></CODE> in interface <CODE><A HREF="../../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html#setOptions(java.lang.String[])">setOptions</A></CODE> in class <CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html" title="class in weka.classifiers.functions.supportVector">Kernel</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>options</CODE> - the list of options as an array of strings
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if an option is not supported</DL>
</DD>
</DL>
<HR>

<A NAME="getOptions()"><!-- --></A><H3>
getOptions</H3>
<PRE>
public java.lang.String[] <B>getOptions</B>()</PRE>
<DL>
<DD>Gets the current settings of the Kernel.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../weka/core/OptionHandler.html#getOptions()">getOptions</A></CODE> in interface <CODE><A HREF="../../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html#getOptions()">getOptions</A></CODE> in class <CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html" title="class in weka.classifiers.functions.supportVector">Kernel</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>an array of strings suitable for passing to setOptions</DL>
</DD>
</DL>
<HR>

<A NAME="eval(int, int, weka.core.Instance)"><!-- --></A><H3>
eval</H3>
<PRE>
public double <B>eval</B>(int&nbsp;id1,
                   int&nbsp;id2,
                   <A HREF="../../../../weka/core/Instance.html" title="class in weka.core">Instance</A>&nbsp;inst1)
            throws java.lang.Exception</PRE>
<DL>
<DD>Implements the abstract function of Kernel using the cache. This method
 uses the evaluate() method to do the actual dot product.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html#eval(int, int, weka.core.Instance)">eval</A></CODE> in class <CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html" title="class in weka.classifiers.functions.supportVector">Kernel</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>id1</CODE> - the index of the first instance in the dataset<DD><CODE>id2</CODE> - the index of the second instance in the dataset<DD><CODE>inst1</CODE> - the instance corresponding to id1 (used if id1 == -1)
<DT><B>Returns:</B><DD>the result of the kernel function
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if something goes wrong</DL>
</DD>
</DL>
<HR>

<A NAME="numEvals()"><!-- --></A><H3>
numEvals</H3>
<PRE>
public int <B>numEvals</B>()</PRE>
<DL>
<DD>Returns the number of time Eval has been called.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html#numEvals()">numEvals</A></CODE> in class <CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html" title="class in weka.classifiers.functions.supportVector">Kernel</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the number of kernel evaluation.</DL>
</DD>
</DL>
<HR>

<A NAME="numCacheHits()"><!-- --></A><H3>
numCacheHits</H3>
<PRE>
public int <B>numCacheHits</B>()</PRE>
<DL>
<DD>Returns the number of cache hits on dot products.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html#numCacheHits()">numCacheHits</A></CODE> in class <CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html" title="class in weka.classifiers.functions.supportVector">Kernel</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the number of cache hits.</DL>
</DD>
</DL>
<HR>

<A NAME="clean()"><!-- --></A><H3>
clean</H3>
<PRE>
public void <B>clean</B>()</PRE>
<DL>
<DD>Frees the cache used by the kernel.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html#clean()">clean</A></CODE> in class <CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html" title="class in weka.classifiers.functions.supportVector">Kernel</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="setCacheSize(int)"><!-- --></A><H3>
setCacheSize</H3>
<PRE>
public void <B>setCacheSize</B>(int&nbsp;value)</PRE>
<DL>
<DD>Sets the size of the cache to use (a prime number)
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - the size of the cache</DL>
</DD>
</DL>
<HR>

<A NAME="getCacheSize()"><!-- --></A><H3>
getCacheSize</H3>
<PRE>
public int <B>getCacheSize</B>()</PRE>
<DL>
<DD>Gets the size of the cache
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the cache size</DL>
</DD>
</DL>
<HR>

<A NAME="cacheSizeTipText()"><!-- --></A><H3>
cacheSizeTipText</H3>
<PRE>
public java.lang.String <B>cacheSizeTipText</B>()</PRE>
<DL>
<DD>Returns the tip text for this property
<P>
<DD><DL>

<DT><B>Returns:</B><DD>tip text for this property suitable for
                        displaying in the explorer/experimenter gui</DL>
</DD>
</DL>
<HR>

<A NAME="buildKernel(weka.core.Instances)"><!-- --></A><H3>
buildKernel</H3>
<PRE>
public void <B>buildKernel</B>(<A HREF="../../../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;data)
                 throws java.lang.Exception</PRE>
<DL>
<DD>builds the kernel with the given data. Initializes the kernel cache. 
 The actual size of the cache in bytes is (64 * cacheSize).
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html#buildKernel(weka.core.Instances)">buildKernel</A></CODE> in class <CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html" title="class in weka.classifiers.functions.supportVector">Kernel</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>data</CODE> - the data to base the kernel on
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if something goes wrong</DL>
</DD>
</DL>
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