c45loader.html

< 数据挖掘--实用机器学习技术及java实现> 一书结合数据挖掘和机器学习的知识,作者陈述了自动挖掘模式的基础理论,并且以java语言实现了具有代表性的各类数据挖掘方法.例如:class

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<TD><B>Methods inherited from class java.lang.Object</B></TD>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="m_structure"><!-- --></A><H3>
m_structure</H3>
<PRE>
protected <A HREF="../../../weka/core/Instances.html">Instances</A> <B>m_structure</B></PRE>
<DL>
<DD>Holds the determined structure (header) of the data set.</DL>
<HR>

<A NAME="m_sourceFile"><!-- --></A><H3>
m_sourceFile</H3>
<PRE>
protected java.io.File <B>m_sourceFile</B></PRE>
<DL>
<DD>Holds the source of the data set. In this case the names file of the
 data set. m_sourceFileData is the data file.</DL>

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<A NAME="C45Loader()"><!-- --></A><H3>
C45Loader</H3>
<PRE>
public <B>C45Loader</B>()</PRE>
<DL>
</DL>

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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>
<DT><B>Returns:</B><DD>a description of the evaluator suitable for
 displaying in the explorer/experimenter gui</DL>
</DD>
</DL>
<HR>

<A NAME="reset()"><!-- --></A><H3>
reset</H3>
<PRE>
public void <B>reset</B>()</PRE>
<DL>
<DD>Resets the Loader ready to read a new data set</DL>
<HR>

<A NAME="setSource(java.io.File)"><!-- --></A><H3>
setSource</H3>
<PRE>
public void <B>setSource</B>(java.io.File&nbsp;file)
               throws java.io.IOException</PRE>
<DL>
<DD>Resets the Loader object and sets the source of the data set to be 
 the supplied File object.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../weka/core/converters/AbstractLoader.html#setSource(java.io.File)">setSource</A></CODE> in class <CODE><A HREF="../../../weka/core/converters/AbstractLoader.html">AbstractLoader</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>file</CODE> - the source file.<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="getStructure()"><!-- --></A><H3>
getStructure</H3>
<PRE>
public <A HREF="../../../weka/core/Instances.html">Instances</A> <B>getStructure</B>()
                       throws java.io.IOException</PRE>
<DL>
<DD>Determines and returns (if possible) the structure (internally the 
 header) of the data set as an empty set of instances.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../weka/core/converters/AbstractLoader.html#getStructure()">getStructure</A></CODE> in class <CODE><A HREF="../../../weka/core/converters/AbstractLoader.html">AbstractLoader</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the structure of the data set as an empty set of Instances<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="getDataSet()"><!-- --></A><H3>
getDataSet</H3>
<PRE>
public <A HREF="../../../weka/core/Instances.html">Instances</A> <B>getDataSet</B>()
                     throws java.io.IOException</PRE>
<DL>
<DD>Return the full data set. If the structure hasn't yet been determined
 by a call to getStructure then method should do so before processing
 the rest of the data set.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../weka/core/converters/AbstractLoader.html#getDataSet()">getDataSet</A></CODE> in class <CODE><A HREF="../../../weka/core/converters/AbstractLoader.html">AbstractLoader</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the structure of the data set as an empty set of Instances<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if there is no source or parsing fails</DL>
</DD>
</DL>
<HR>

<A NAME="getNextInstance()"><!-- --></A><H3>
getNextInstance</H3>
<PRE>
public <A HREF="../../../weka/core/Instance.html">Instance</A> <B>getNextInstance</B>()
                         throws java.io.IOException</PRE>
<DL>
<DD>Read the data set incrementally---get the next instance in the data 
 set or returns null if there are no
 more instances to get. If the structure hasn't yet been 
 determined by a call to getStructure then method should do so before
 returning the next instance in the data set.

 If it is not possible to read the data set incrementally (ie. in cases
 where the data set structure cannot be fully established before all
 instances have been seen) then an exception should be thrown.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../weka/core/converters/AbstractLoader.html#getNextInstance()">getNextInstance</A></CODE> in class <CODE><A HREF="../../../weka/core/converters/AbstractLoader.html">AbstractLoader</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the next instance in the data set as an Instance object or null
 if there are no more instances to be read<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if there is an error during parsing</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>
<DT><B>Parameters:</B><DD><CODE>args</CODE> - should contain <filestem>[.names | data]</DL>
</DD>
</DL>
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