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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Wed Sep 04 10:31:51 CDT 2002 --><TITLE>: Class SpreadSubsampleFilter</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../weka/filters/SplitDatasetFilter.html"><B>PREV CLASS</B></A> <A HREF="../../weka/filters/StringToNominalFilter.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="SpreadSubsampleFilter.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | <A HREF="#fields_inherited_from_class_weka.filters.Filter">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">weka.filters</FONT><BR>Class SpreadSubsampleFilter</H2><PRE>java.lang.Object | +--<A HREF="../../weka/filters/Filter.html">weka.filters.Filter</A> | +--<B>weka.filters.SpreadSubsampleFilter</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../weka/core/OptionHandler.html">OptionHandler</A>, java.io.Serializable</DD></DL><HR><DL><DT>public class <B>SpreadSubsampleFilter</B><DT>extends <A HREF="../../weka/filters/Filter.html">Filter</A><DT>implements <A HREF="../../weka/core/OptionHandler.html">OptionHandler</A></DL><P>Produces a random subsample of a dataset. The original dataset must fit entirely in memory. This filter allows you to specify the maximum "spread" between the rarest and most common class. For example, you may specify that there be at most a 2:1 difference in class frequencies. When used in batch mode, subsequent batches are <b>not</b> resampled. Valid options are:<p> -S num <br> Specify the random number seed (default 1).<p> -M num <br> The maximum class distribution spread. <br> 0 = no maximum spread, 1 = uniform distribution, 10 = allow at most a 10:1 ratio between the classes (default 0) <p> -X num <br> The maximum count for any class value. <br> (default 0 = unlimited) <p> -W <br> Adjust weights so that total weight per class is maintained. Individual instance weighting is not preserved. (default no weights adjustment) <p><P><DL><DT><B>See Also: </B><DD><A HREF="../../serialized-form.html#weka.filters.SpreadSubsampleFilter">Serialized Form</A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="fields_inherited_from_class_weka.filters.Filter"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Fields inherited from class weka.filters.<A HREF="../../weka/filters/Filter.html">Filter</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../weka/filters/Filter.html#m_NewBatch">m_NewBatch</A></CODE></TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#SpreadSubsampleFilter()">SpreadSubsampleFilter</A></B>()</CODE><BR> </TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#batchFinished()">batchFinished</A></B>()</CODE><BR> Signify that this batch of input to the filter is finished.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#getAdjustWeights()">getAdjustWeights</A></B>()</CODE><BR> Returns true if instance weights will be adjusted to maintain total weight per class.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> double</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#getDistributionSpread()">getDistributionSpread</A></B>()</CODE><BR> Gets the value for the distribution spread</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> double</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#getMaxCount()">getMaxCount</A></B>()</CODE><BR> Gets the value for the max count</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.String[]</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#getOptions()">getOptions</A></B>()</CODE><BR> Gets the current settings of the filter.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#getRandomSeed()">getRandomSeed</A></B>()</CODE><BR> Gets the random number seed.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#input(weka.core.Instance)">input</A></B>(<A HREF="../../weka/core/Instance.html">Instance</A> instance)</CODE><BR> Input an instance for filtering.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.util.Enumeration</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#listOptions()">listOptions</A></B>()</CODE><BR> Returns an enumeration describing the available options</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static void</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#main(java.lang.String[])">main</A></B>(java.lang.String[] argv)</CODE><BR> Main method for testing this class.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#setAdjustWeights(boolean)">setAdjustWeights</A></B>(boolean newAdjustWeights)</CODE><BR> Sets whether the instance weights will be adjusted to maintain total weight per class.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#setDistributionSpread(double)">setDistributionSpread</A></B>(double spread)</CODE><BR> Sets the value for the distribution spread</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#setInputFormat(weka.core.Instances)">setInputFormat</A></B>(<A HREF="../../weka/core/Instances.html">Instances</A> instanceInfo)</CODE><BR> Sets the format of the input instances.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#setMaxCount(double)">setMaxCount</A></B>(double maxcount)</CODE><BR> Sets the value for the max count</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#setOptions(java.lang.String[])">setOptions</A></B>(java.lang.String[] options)</CODE><BR> Parses a list of options for this object.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/filters/SpreadSubsampleFilter.html#setRandomSeed(int)">setRandomSeed</A></B>(int newSeed)</CODE><BR> Sets the random number seed.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_weka.filters.Filter"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class weka.filters.<A HREF="../../weka/filters/Filter.html">Filter</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../weka/filters/Filter.html#batchFilterFile(weka.filters.Filter, java.lang.String[])">batchFilterFile</A>, <A HREF="../../weka/filters/Filter.html#bufferInput(weka.core.Instance)">bufferInput</A>, <A HREF="../../weka/filters/Filter.html#copyStringValues(weka.core.Instance, boolean, weka.core.Instances, weka.core.Instances)">copyStringValues</A>, <A HREF="../../weka/filters/Filter.html#copyStringValues(weka.core.Instance, boolean, weka.core.Instances, int[], weka.core.Instances, int[])">copyStringValues</A>, <A HREF="../../weka/filters/Filter.html#filterFile(weka.filters.Filter, java.lang.String[])">filterFile</A>, <A HREF="../../weka/filters/Filter.html#flushInput()">flushInput</A>, <A HREF="../../weka/filters/Filter.html#getInputFormat()">getInputFormat</A>, <A HREF="../../weka/filters/Filter.html#getInputStringIndex()">getInputStringIndex</A>, <A HREF="../../weka/filters/Filter.html#getOutputFormat()">getOutputFormat</A>, <A HREF="../../weka/filters/Filter.html#getOutputStringIndex()">getOutputStringIndex</A>, <A HREF="../../weka/filters/Filter.html#getStringIndices(weka.core.Instances)">getStringIndices</A>, <A HREF="../../weka/filters/Filter.html#inputFormat(weka.core.Instances)">inputFormat</A>, <A HREF="../../weka/filters/Filter.html#isOutputFormatDefined()">isOutputFormatDefined</A>, <A HREF="../../weka/filters/Filter.html#numPendingOutput()">numPendingOutput</A>, <A HREF="../../weka/filters/Filter.html#output()">output</A>, <A HREF="../../weka/filters/Filter.html#outputFormat()">outputFormat</A>, <A HREF="../../weka/filters/Filter.html#outputFormatPeek()">outputFormatPeek</A>, <A HREF="../../weka/filters/Filter.html#outputPeek()">outputPeek</A>, <A HREF="../../weka/filters/Filter.html#push(weka.core.Instance)">push</A>, <A HREF="../../weka/filters/Filter.html#resetQueue()">resetQueue</A>, <A HREF="../../weka/filters/Filter.html#setOutputFormat(weka.core.Instances)">setOutputFormat</A>, <A HREF="../../weka/filters/Filter.html#useFilter(weka.core.Instances, weka.filters.Filter)">useFilter</A></CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.lang.Object</B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Constructor Detail</B></FONT></TD></TR></TABLE><A NAME="SpreadSubsampleFilter()"><!-- --></A><H3>⌨️ 快捷键说明
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