instancefilter.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

<HR>

<A NAME="input(weka.core.Instance)"><!-- --></A><H3>
input</H3>
<PRE>
public boolean <B>input</B>(<A HREF="../../weka/core/Instance.html">Instance</A>&nbsp;instance)</PRE>
<DL>
<DD>Input an instance for filtering. Ordinarily the instance is processed
 and made available for output immediately. Some filters require all
 instances be read before producing output.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/filters/Filter.html#input(weka.core.Instance)">input</A></CODE> in class <CODE><A HREF="../../weka/filters/Filter.html">Filter</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>instance</CODE> - the input instance<DT><B>Returns:</B><DD>true if the filtered instance may now be
 collected with output().<DT><B>Throws:</B><DD><CODE>java.lang.IllegalStateException</CODE> - if no input format has been set.</DL>
</DD>
</DL>
<HR>

<A NAME="isNominal()"><!-- --></A><H3>
isNominal</H3>
<PRE>
public boolean <B>isNominal</B>()</PRE>
<DL>
<DD>Returns true if selection attribute is nominal.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if selection attribute is nominal</DL>
</DD>
</DL>
<HR>

<A NAME="isNumeric()"><!-- --></A><H3>
isNumeric</H3>
<PRE>
public boolean <B>isNumeric</B>()</PRE>
<DL>
<DD>Returns true if selection attribute is numeric.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if selection attribute is numeric</DL>
</DD>
</DL>
<HR>

<A NAME="getModifyHeader()"><!-- --></A><H3>
getModifyHeader</H3>
<PRE>
public boolean <B>getModifyHeader</B>()</PRE>
<DL>
<DD>Gets whether the header will be modified when selecting on nominal
 attributes.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if so.</DL>
</DD>
</DL>
<HR>

<A NAME="setModifyHeader(boolean)"><!-- --></A><H3>
setModifyHeader</H3>
<PRE>
public void <B>setModifyHeader</B>(boolean&nbsp;newModifyHeader)</PRE>
<DL>
<DD>Sets whether the header will be modified when selecting on nominal
 attributes.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>newModifyHeader</CODE> - true if so.</DL>
</DD>
</DL>
<HR>

<A NAME="getAttributeIndex()"><!-- --></A><H3>
getAttributeIndex</H3>
<PRE>
public int <B>getAttributeIndex</B>()</PRE>
<DL>
<DD>Get the attribute to be used for selection (-1 for last)<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the attribute index</DL>
</DD>
</DL>
<HR>

<A NAME="setAttributeIndex(int)"><!-- --></A><H3>
setAttributeIndex</H3>
<PRE>
public void <B>setAttributeIndex</B>(int&nbsp;attribute)</PRE>
<DL>
<DD>Sets attribute to be used for selection<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>attribute</CODE> - the attribute's index (-1 for last);</DL>
</DD>
</DL>
<HR>

<A NAME="getSplitPoint()"><!-- --></A><H3>
getSplitPoint</H3>
<PRE>
public double <B>getSplitPoint</B>()</PRE>
<DL>
<DD>Get the split point used for numeric selection<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the numeric split point</DL>
</DD>
</DL>
<HR>

<A NAME="setSplitPoint(double)"><!-- --></A><H3>
setSplitPoint</H3>
<PRE>
public void <B>setSplitPoint</B>(double&nbsp;value)</PRE>
<DL>
<DD>Split point to be used for selection on numeric attribute.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - the split point</DL>
</DD>
</DL>
<HR>

<A NAME="getMatchMissingValues()"><!-- --></A><H3>
getMatchMissingValues</H3>
<PRE>
public boolean <B>getMatchMissingValues</B>()</PRE>
<DL>
<DD>Gets whether missing values are counted as a match.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if missing values are counted as a match.</DL>
</DD>
</DL>
<HR>

<A NAME="setMatchMissingValues(boolean)"><!-- --></A><H3>
setMatchMissingValues</H3>
<PRE>
public void <B>setMatchMissingValues</B>(boolean&nbsp;newMatchMissingValues)</PRE>
<DL>
<DD>Sets whether missing values are counted as a match.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>newMatchMissingValues</CODE> - true if missing values are counted as a match.</DL>
</DD>
</DL>
<HR>

<A NAME="getInvertSelection()"><!-- --></A><H3>
getInvertSelection</H3>
<PRE>
public boolean <B>getInvertSelection</B>()</PRE>
<DL>
<DD>Get whether the supplied columns are to be removed or kept<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if the supplied columns will be kept</DL>
</DD>
</DL>
<HR>

<A NAME="setInvertSelection(boolean)"><!-- --></A><H3>
setInvertSelection</H3>
<PRE>
public void <B>setInvertSelection</B>(boolean&nbsp;invert)</PRE>
<DL>
<DD>Set whether selected values should be removed or kept. If true the 
 selected values are kept and unselected values are deleted.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>invert</CODE> - the new invert setting</DL>
</DD>
</DL>
<HR>

<A NAME="getNominalIndices()"><!-- --></A><H3>
getNominalIndices</H3>
<PRE>
public java.lang.String <B>getNominalIndices</B>()</PRE>
<DL>
<DD>Get the set of nominal value indices that will be used for selection<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>rangeList a string representing the list of nominal indices.</DL>
</DD>
</DL>
<HR>

<A NAME="setNominalIndices(java.lang.String)"><!-- --></A><H3>
setNominalIndices</H3>
<PRE>
public void <B>setNominalIndices</B>(java.lang.String&nbsp;rangeList)</PRE>
<DL>
<DD>Set which nominal labels are to be included in the selection.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rangeList</CODE> - a string representing the list of nominal indices.
 eg: first-3,5,6-last<DT><B>Throws:</B><DD><CODE>InvalidArgumentException</CODE> - if an invalid range list is supplied</DL>
</DD>
</DL>
<HR>

<A NAME="setNominalIndicesArr(int[])"><!-- --></A><H3>
setNominalIndicesArr</H3>
<PRE>
public void <B>setNominalIndicesArr</B>(int[]&nbsp;values)</PRE>
<DL>
<DD>Set which values of a nominal attribute are to be used for
 selection.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>values</CODE> - an array containing indexes of values to be
 used for selection<DT><B>Throws:</B><DD><CODE>InvalidArgumentException</CODE> - if an invalid set of ranges is supplied</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.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>argv</CODE> - should contain arguments to the filter: 
 use -h for help</DL>
</DD>
</DL>
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