gainratioattributeeval.html

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<B>Constructor Detail</B></FONT></TD>
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<A NAME="GainRatioAttributeEval()"><!-- --></A><H3>
GainRatioAttributeEval</H3>
<PRE>
public <B>GainRatioAttributeEval</B>()</PRE>
<DL>
<DD>Constructor</DL>

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<B>Method Detail</B></FONT></TD>
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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 this attribute evaluator<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>a description of the evaluator suitable for
 displaying in the explorer/experimenter gui</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<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">OptionHandler</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. Valid options are:<p>

 -M <br>
 Treat missing values as a seperate value. <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">OptionHandler</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="missingMergeTipText()"><!-- --></A><H3>
missingMergeTipText</H3>
<PRE>
public java.lang.String <B>missingMergeTipText</B>()</PRE>
<DL>
<DD>Returns the tip text for this property<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="setMissingMerge(boolean)"><!-- --></A><H3>
setMissingMerge</H3>
<PRE>
public void <B>setMissingMerge</B>(boolean&nbsp;b)</PRE>
<DL>
<DD>distribute the counts for missing values across observed values<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>b</CODE> - true=distribute missing values.</DL>
</DD>
</DL>
<HR>

<A NAME="getMissingMerge()"><!-- --></A><H3>
getMissingMerge</H3>
<PRE>
public boolean <B>getMissingMerge</B>()</PRE>
<DL>
<DD>get whether missing values are being distributed or not<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if missing values are being distributed.</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 WrapperSubsetEval.<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">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="buildEvaluator(weka.core.Instances)"><!-- --></A><H3>
buildEvaluator</H3>
<PRE>
public void <B>buildEvaluator</B>(<A HREF="../../weka/core/Instances.html">Instances</A>&nbsp;data)
                    throws java.lang.Exception</PRE>
<DL>
<DD>Initializes a gain ratio attribute evaluator.
 Discretizes all attributes that are numeric.<DD><DL>
<DT><B>Overrides:</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">ASEvaluation</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>data</CODE> - set of instances serving as training data<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if the evaluator has not been 
 generated successfully</DL>
</DD>
</DL>
<HR>

<A NAME="resetOptions()"><!-- --></A><H3>
resetOptions</H3>
<PRE>
protected void <B>resetOptions</B>()</PRE>
<DL>
<DD>reset options to default values<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="evaluateAttribute(int)"><!-- --></A><H3>
evaluateAttribute</H3>
<PRE>
public double <B>evaluateAttribute</B>(int&nbsp;attribute)
                         throws java.lang.Exception</PRE>
<DL>
<DD>evaluates an individual attribute by measuring the gain ratio
 of the class given the attribute.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/attributeSelection/AttributeEvaluator.html#evaluateAttribute(int)">evaluateAttribute</A></CODE> in class <CODE><A HREF="../../weka/attributeSelection/AttributeEvaluator.html">AttributeEvaluator</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>attribute</CODE> - the index of the attribute to be evaluated<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if the attribute could not be evaluated</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public java.lang.String <B>toString</B>()</PRE>
<DL>
<DD>Return a description of the evaluator<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>description as a string</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;args)</PRE>
<DL>
<DD>Main method for testing this class.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>args</CODE> - the options
 -t training file</DL>
</DD>
</DL>
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