filter.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

<DD><DL>

<DT><B>Returns:</B><DD>the instance that has most recently been filtered (or null if
 the queue is empty).
<DT><B>Throws:</B>
<DD><CODE>java.lang.NullPointerException</CODE> - if no output structure has been defined</DL>
</DD>
</DL>
<HR>

<A NAME="outputPeek()"><!-- --></A><H3>
outputPeek</H3>
<PRE>
public <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> <B>outputPeek</B>()</PRE>
<DL>
<DD>Output an instance after filtering but do not remove from the
 output queue.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the instance that has most recently been filtered (or null if
 the queue is empty).
<DT><B>Throws:</B>
<DD><CODE>java.lang.NullPointerException</CODE> - if no input structure has been defined</DL>
</DD>
</DL>
<HR>

<A NAME="numPendingOutput()"><!-- --></A><H3>
numPendingOutput</H3>
<PRE>
public int <B>numPendingOutput</B>()</PRE>
<DL>
<DD>Returns the number of instances pending output
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the number of instances  pending output
<DT><B>Throws:</B>
<DD><CODE>java.lang.NullPointerException</CODE> - if no input structure has been defined</DL>
</DD>
</DL>
<HR>

<A NAME="isOutputFormatDefined()"><!-- --></A><H3>
isOutputFormatDefined</H3>
<PRE>
public boolean <B>isOutputFormatDefined</B>()</PRE>
<DL>
<DD>Returns whether the output format is ready to be collected
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>true if the output format is set</DL>
</DD>
</DL>
<HR>

<A NAME="makeCopy(weka.filters.Filter)"><!-- --></A><H3>
makeCopy</H3>
<PRE>
public static <A HREF="../../weka/filters/Filter.html" title="class in weka.filters">Filter</A> <B>makeCopy</B>(<A HREF="../../weka/filters/Filter.html" title="class in weka.filters">Filter</A>&nbsp;model)
                       throws java.lang.Exception</PRE>
<DL>
<DD>Creates a deep copy of the given filter using serialization.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>model</CODE> - the filter to copy
<DT><B>Returns:</B><DD>a deep copy of the filter
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="makeCopies(weka.filters.Filter, int)"><!-- --></A><H3>
makeCopies</H3>
<PRE>
public static <A HREF="../../weka/filters/Filter.html" title="class in weka.filters">Filter</A>[] <B>makeCopies</B>(<A HREF="../../weka/filters/Filter.html" title="class in weka.filters">Filter</A>&nbsp;model,
                                  int&nbsp;num)
                           throws java.lang.Exception</PRE>
<DL>
<DD>Creates a given number of deep copies of the given filter using 
 serialization.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>model</CODE> - the filter to copy<DD><CODE>num</CODE> - the number of filter copies to create.
<DT><B>Returns:</B><DD>an array of filters.
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="useFilter(weka.core.Instances, weka.filters.Filter)"><!-- --></A><H3>
useFilter</H3>
<PRE>
public static <A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>useFilter</B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;data,
                                  <A HREF="../../weka/filters/Filter.html" title="class in weka.filters">Filter</A>&nbsp;filter)
                           throws java.lang.Exception</PRE>
<DL>
<DD>Filters an entire set of instances through a filter and returns
 the new set.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>data</CODE> - the data to be filtered<DD><CODE>filter</CODE> - the filter to be used
<DT><B>Returns:</B><DD>the filtered set of data
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if the filter can't be used successfully</DL>
</DD>
</DL>
<HR>

<A NAME="filterFile(weka.filters.Filter, java.lang.String[])"><!-- --></A><H3>
filterFile</H3>
<PRE>
public static void <B>filterFile</B>(<A HREF="../../weka/filters/Filter.html" title="class in weka.filters">Filter</A>&nbsp;filter,
                              java.lang.String[]&nbsp;options)
                       throws java.lang.Exception</PRE>
<DL>
<DD>Method for testing filters.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>filter</CODE> - the filter to use<DD><CODE>options</CODE> - should contain the following arguments: <br>
 -i input_file <br>
 -o output_file <br>
 -c class_index <br>
 or -h for help on options
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if something goes wrong or the user requests help on
 command options</DL>
</DD>
</DL>
<HR>

<A NAME="batchFilterFile(weka.filters.Filter, java.lang.String[])"><!-- --></A><H3>
batchFilterFile</H3>
<PRE>
public static void <B>batchFilterFile</B>(<A HREF="../../weka/filters/Filter.html" title="class in weka.filters">Filter</A>&nbsp;filter,
                                   java.lang.String[]&nbsp;options)
                            throws java.lang.Exception</PRE>
<DL>
<DD>Method for testing filters ability to process multiple batches.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>filter</CODE> - the filter to use<DD><CODE>options</CODE> - should contain the following arguments:<br>
 -i (first) input file <br>
 -o (first) output file <br>
 -r (second) input file <br>
 -s (second) output file <br>
 -c class_index <br>
 or -h for help on options
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if something goes wrong or the user requests help on
 command options</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.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>args</CODE> - should contain arguments to the filter: use -h for help</DL>
</DD>
</DL>
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