stringkernel.html

weka是机器学习和数据挖掘领域最有影响力的开源项目之一

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<B>Constructor Detail</B></FONT></TH>
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<A NAME="StringKernel()"><!-- --></A><H3>
StringKernel</H3>
<PRE>
public <B>StringKernel</B>()</PRE>
<DL>
<DD>default constructor
<P>
</DL>
<HR>

<A NAME="StringKernel(weka.core.Instances, int, int, double, boolean)"><!-- --></A><H3>
StringKernel</H3>
<PRE>
public <B>StringKernel</B>(<A HREF="../../../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;data,
                    int&nbsp;cacheSize,
                    int&nbsp;subsequenceLength,
                    double&nbsp;lambda,
                    boolean&nbsp;debug)
             throws java.lang.Exception</PRE>
<DL>
<DD>creates a new StringKernel object. Initializes the kernel cache and the
 'lambda cache', i.e. the precalculated powers of lambda from lambda^2 to
 lambda^MAX_POWER_OF_LAMBDA
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>data</CODE> - the dataset to use<DD><CODE>cacheSize</CODE> - the size of the cache<DD><CODE>subsequenceLength</CODE> - the subsequence length<DD><CODE>lambda</CODE> - the lambda value<DD><CODE>debug</CODE> - whether to output debug information
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if something goes wrong</DL>
</DL>

<!-- ============ METHOD DETAIL ========== -->

<A NAME="method_detail"><!-- --></A>
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<B>Method Detail</B></FONT></TH>
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<A NAME="globalInfo()"><!-- --></A><H3>
globalInfo</H3>
<PRE>
public java.lang.String <B>globalInfo</B>()</PRE>
<DL>
<DD>Returns a string describing the kernel
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html#globalInfo()">globalInfo</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>a description suitable for displaying in the
         explorer/experimenter gui</DL>
</DD>
</DL>
<HR>

<A NAME="getTechnicalInformation()"><!-- --></A><H3>
getTechnicalInformation</H3>
<PRE>
public <A HREF="../../../../weka/core/TechnicalInformation.html" title="class in weka.core">TechnicalInformation</A> <B>getTechnicalInformation</B>()</PRE>
<DL>
<DD>Returns an instance of a TechnicalInformation object, containing 
 detailed information about the technical background of this class,
 e.g., paper reference or book this class is based on.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../weka/core/TechnicalInformationHandler.html#getTechnicalInformation()">getTechnicalInformation</A></CODE> in interface <CODE><A HREF="../../../../weka/core/TechnicalInformationHandler.html" title="interface in weka.core">TechnicalInformationHandler</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the technical information about this class</DL>
</DD>
</DL>
<HR>

<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/>
 
   <!-- options-start -->
 Valid options are: <p/>
 
 <pre> -D
  Enables debugging output (if available) to be printed.
  (default: off)</pre>
 
 <pre> -no-checks
  Turns off all checks - use with caution!
  (default: checks on)</pre>
 
 <pre> -P &lt;0|1&gt;
  The pruning method to use:
  0 = No pruning
  1 = Lambda pruning
  (default: 0)</pre>
 
 <pre> -C &lt;num&gt;
  The size of the cache (a prime number).
  (default: 250007)</pre>
 
 <pre> -IC &lt;num&gt;
  The size of the internal cache (a prime number).
  (default: 200003)</pre>
 
 <pre> -L &lt;num&gt;
  The lambda constant. Penalizes non-continuous subsequence
  matches. Must be in (0,1).
  (default: 0.5)</pre>
 
 <pre> -ssl &lt;num&gt;
  The length of the subsequence.
  (default: 3)</pre>
 
 <pre> -ssl-max &lt;num&gt;
  The maximum length of the subsequence.
  (default: 9)</pre>
 
 <pre> -N
  Use normalization.
  (default: no)</pre>
 
   <!-- options-end -->
<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="pruningMethodTipText()"><!-- --></A><H3>
pruningMethodTipText</H3>
<PRE>
public java.lang.String <B>pruningMethodTipText</B>()</PRE>
<DL>
<DD>Returns the tip text for this property
<P>
<DD><DL>
</DL>
</DD>
<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="setPruningMethod(weka.core.SelectedTag)"><!-- --></A><H3>
setPruningMethod</H3>
<PRE>
public void <B>setPruningMethod</B>(<A HREF="../../../../weka/core/SelectedTag.html" title="class in weka.core">SelectedTag</A>&nbsp;value)</PRE>
<DL>
<DD>Sets the method used to for pruning.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - the pruning method to use.</DL>
</DD>
</DL>
<HR>

<A NAME="getPruningMethod()"><!-- --></A><H3>
getPruningMethod</H3>
<PRE>
public <A HREF="../../../../weka/core/SelectedTag.html" title="class in weka.core">SelectedTag</A> <B>getPruningMethod</B>()</PRE>
<DL>
<DD>Gets the method used for pruning.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the pruning method to use.</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>
</DL>
</DD>
<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>
</DL>
</DD>
<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>
</DL>
</DD>
<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="setInternalCacheSize(int)"><!-- --></A><H3>
setInternalCacheSize</H3>
<PRE>
public void <B>setInternalCacheSize</B>(int&nbsp;value)</PRE>
<DL>
<DD>sets the size of the internal cache for intermediate results. Memory
 consumption is about 16x this amount in bytes. Only use when lambda
 pruning is switched off.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - the size of the internal cache</DL>
</DD>
</DL>
<HR>

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

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

<A NAME="internalCacheSizeTipText()"><!-- --></A><H3>
internalCacheSizeTipText</H3>
<PRE>
public java.lang.String <B>internalCacheSizeTipText</B>()</PRE>
<DL>
<DD>Returns the tip text for this property
<P>
<DD><DL>
</DL>
</DD>
<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="setSubsequenceLength(int)"><!-- --></A><H3>
setSubsequenceLength</H3>
<PRE>
public void <B>setSubsequenceLength</B>(int&nbsp;value)</PRE>
<DL>
<DD>Sets the length of the subsequence.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - the length</DL>
</DD>
</DL>
<HR>

<A NAME="getSubsequenceLength()"><!-- --></A><H3>
getSubsequenceLength</H3>
<PRE>
public int <B>getSubsequenceLength</B>()</PRE>
<DL>
<DD>Returns the length of the subsequence
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the length</DL>
</DD>
</DL>
<HR>

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