latentsemanticanalysis.html

数据挖掘的最常用工具。由于开源

 displaying in the explorer/experimenter gui</DL>
</DD>
</DL>
<HR>

<A NAME="setMaximumAttributeNames(int)"><!-- --></A><H3>
setMaximumAttributeNames</H3>
<PRE>
public void <B>setMaximumAttributeNames</B>(int&nbsp;newMaxAttributes)</PRE>
<DL>
<DD>Sets maximum number of attributes to include in
 transformed attribute names.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>newMaxAttributes</CODE> - the maximum number of attributes</DL>
</DD>
</DL>
<HR>

<A NAME="getMaximumAttributeNames()"><!-- --></A><H3>
getMaximumAttributeNames</H3>
<PRE>
public int <B>getMaximumAttributeNames</B>()</PRE>
<DL>
<DD>Gets maximum number of attributes to include in
 transformed attribute names.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the maximum number of attributes</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 LatentSemanticAnalysis
<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></DL>
</DD>
<DD><DL>

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

<A NAME="getCapabilities()"><!-- --></A><H3>
getCapabilities</H3>
<PRE>
public <A HREF="../../weka/core/Capabilities.html" title="class in weka.core">Capabilities</A> <B>getCapabilities</B>()</PRE>
<DL>
<DD>Returns the capabilities of this evaluator.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../weka/core/CapabilitiesHandler.html#getCapabilities()">getCapabilities</A></CODE> in interface <CODE><A HREF="../../weka/core/CapabilitiesHandler.html" title="interface in weka.core">CapabilitiesHandler</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/attributeSelection/ASEvaluation.html#getCapabilities()">getCapabilities</A></CODE> in class <CODE><A HREF="../../weka/attributeSelection/ASEvaluation.html" title="class in weka.attributeSelection">ASEvaluation</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the capabilities of this evaluator<DT><B>See Also:</B><DD><A HREF="../../weka/core/Capabilities.html" title="class in weka.core"><CODE>Capabilities</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="buildEvaluator(weka.core.Instances)"><!-- --></A><H3>
buildEvaluator</H3>
<PRE>
public void <B>buildEvaluator</B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;data)
                    throws java.lang.Exception</PRE>
<DL>
<DD>Initializes the singular values/vectors and performs the analysis
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../weka/attributeSelection/ASEvaluation.html#buildEvaluator(weka.core.Instances)">buildEvaluator</A></CODE> in class <CODE><A HREF="../../weka/attributeSelection/ASEvaluation.html" title="class in weka.attributeSelection">ASEvaluation</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>data</CODE> - the instances to analyse/transform
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if analysis fails</DL>
</DD>
</DL>
<HR>

<A NAME="transformedHeader()"><!-- --></A><H3>
transformedHeader</H3>
<PRE>
public <A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>transformedHeader</B>()
                            throws java.lang.Exception</PRE>
<DL>
<DD>Returns just the header for the transformed data (ie. an empty
 set of instances. This is so that AttributeSelection can
 determine the structure of the transformed data without actually
 having to get all the transformed data through getTransformedData().
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../weka/attributeSelection/AttributeTransformer.html#transformedHeader()">transformedHeader</A></CODE> in interface <CODE><A HREF="../../weka/attributeSelection/AttributeTransformer.html" title="interface in weka.attributeSelection">AttributeTransformer</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the header of the transformed data.
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if the header of the transformed data can't
 be determined.</DL>
</DD>
</DL>
<HR>

<A NAME="transformedData()"><!-- --></A><H3>
transformedData</H3>
<PRE>
public <A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>transformedData</B>()
                          throws java.lang.Exception</PRE>
<DL>
<DD>Gets the transformed training data.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../weka/attributeSelection/AttributeTransformer.html#transformedData()">transformedData</A></CODE> in interface <CODE><A HREF="../../weka/attributeSelection/AttributeTransformer.html" title="interface in weka.attributeSelection">AttributeTransformer</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the transformed training data
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if transformed data can't be returned</DL>
</DD>
</DL>
<HR>

<A NAME="evaluateAttribute(int)"><!-- --></A><H3>
evaluateAttribute</H3>
<PRE>
public double <B>evaluateAttribute</B>(int&nbsp;att)
                         throws java.lang.Exception</PRE>
<DL>
<DD>Evaluates the merit of a transformed attribute. This is defined
 to be the square of the singular value for the latent variable 
 corresponding to the transformed attribute.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../weka/attributeSelection/AttributeEvaluator.html#evaluateAttribute(int)">evaluateAttribute</A></CODE> in interface <CODE><A HREF="../../weka/attributeSelection/AttributeEvaluator.html" title="interface in weka.attributeSelection">AttributeEvaluator</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>att</CODE> - the attribute to be evaluated
<DT><B>Returns:</B><DD>the merit of a transformed attribute
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if attribute can't be evaluated</DL>
</DD>
</DL>
<HR>

<A NAME="convertInstance(weka.core.Instance)"><!-- --></A><H3>
convertInstance</H3>
<PRE>
public <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> <B>convertInstance</B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A>&nbsp;instance)
                         throws java.lang.Exception</PRE>
<DL>
<DD>Transform an instance in original (unnormalized) format
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../weka/attributeSelection/AttributeTransformer.html#convertInstance(weka.core.Instance)">convertInstance</A></CODE> in interface <CODE><A HREF="../../weka/attributeSelection/AttributeTransformer.html" title="interface in weka.attributeSelection">AttributeTransformer</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>instance</CODE> - an instance in the original (unnormalized) format
<DT><B>Returns:</B><DD>a transformed instance
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if instance can't be transformed</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public java.lang.String <B>toString</B>()</PRE>
<DL>
<DD>Returns a description of this attribute transformer
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>toString</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a String describing this attribute transformer</DL>
</DD>
</DL>
<HR>

<A NAME="getRevision()"><!-- --></A><H3>
getRevision</H3>
<PRE>
public java.lang.String <B>getRevision</B>()</PRE>
<DL>
<DD>Returns the revision string.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../weka/core/RevisionHandler.html#getRevision()">getRevision</A></CODE> in interface <CODE><A HREF="../../weka/core/RevisionHandler.html" title="interface in weka.core">RevisionHandler</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/attributeSelection/ASEvaluation.html#getRevision()">getRevision</A></CODE> in class <CODE><A HREF="../../weka/attributeSelection/ASEvaluation.html" title="class in weka.attributeSelection">ASEvaluation</A></CODE></DL>
</DD>
<DD><DL>

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

<A NAME="main(java.lang.String[])"><!-- --></A><H3>
main</H3>
<PRE>
public static void <B>main</B>(java.lang.String[]&nbsp;argv)</PRE>
<DL>
<DD>Main method for testing this class
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>argv</CODE> - should contain the command line arguments to the
 evaluator/transformer (see AttributeSelection)</DL>
</DD>
</DL>
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