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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.5.0_13) on Tue Jul 15 15:48:38 NZST 2008 --><TITLE>CheckKernel</TITLE><META NAME="keywords" CONTENT="weka.classifiers.functions.supportVector.CheckKernel class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="CheckKernel";}</SCRIPT><NOSCRIPT></NOSCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <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> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="http://www.cs.waikato.ac.nz/ml/weka/" target="_blank"><FONT CLASS="NavBarFont1"><B>Weka's home</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/classifiers/functions/supportVector/CachedKernel.html" title="class in weka.classifiers.functions.supportVector"><B>PREV CLASS</B></A> <A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html" title="class in weka.classifiers.functions.supportVector"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html?weka/classifiers/functions/supportVector/CheckKernel.html" target="_top"><B>FRAMES</B></A> <A HREF="CheckKernel.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: <A HREF="#nested_classes_inherited_from_class_weka.core.CheckScheme">NESTED</A> | FIELD | <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><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">weka.classifiers.functions.supportVector</FONT><BR>Class CheckKernel</H2><PRE>java.lang.Object <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../weka/core/Check.html" title="class in weka.core">weka.core.Check</A> <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../weka/core/CheckScheme.html" title="class in weka.core">weka.core.CheckScheme</A> <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>weka.classifiers.functions.supportVector.CheckKernel</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A>, <A HREF="../../../../weka/core/RevisionHandler.html" title="interface in weka.core">RevisionHandler</A></DD></DL><HR><DL><DT><PRE>public class <B>CheckKernel</B><DT>extends <A HREF="../../../../weka/core/CheckScheme.html" title="class in weka.core">CheckScheme</A></DL></PRE><P>Class for examining the capabilities and finding problems with kernels. If you implement an kernels using the WEKA.libraries, you should run the checks on it to ensure robustness and correct operation. Passing all the tests of this object does not mean bugs in the kernels don't exist, but this will help find some common ones. <p/> Typical usage: <p/> <code>java weka.classifiers.functions.supportVector.CheckKernel -W kernel_name -- kernel_options </code><p/> CheckKernel reports on the following: <ul> <li> Kernel abilities <ul> <li> Possible command line options to the kernels </li> <li> Whether the kernels can predict nominal, numeric, string, date or relational class attributes. </li> <li> Whether the kernels can handle numeric predictor attributes </li> <li> Whether the kernels can handle nominal predictor attributes </li> <li> Whether the kernels can handle string predictor attributes </li> <li> Whether the kernels can handle date predictor attributes </li> <li> Whether the kernels can handle relational predictor attributes </li> <li> Whether the kernels can handle multi-instance data </li> <li> Whether the kernels can handle missing predictor values </li> <li> Whether the kernels can handle missing class values </li> <li> Whether a nominal kernels only handles 2 class problems </li> <li> Whether the kernels can handle instance weights </li> </ul> </li> <li> Correct functioning <ul> <li> Correct initialisation during buildKernel (i.e. no result changes when buildKernel called repeatedly) </li> <li> Whether the kernels alters the data passed to it (number of instances, instance order, instance weights, etc) </li> </ul> </li> <li> Degenerate cases <ul> <li> building kernels with zero training instances </li> <li> all but one predictor attribute values missing </li> <li> all predictor attribute values missing </li> <li> all but one class values missing </li> <li> all class values missing </li> </ul> </li> </ul> Running CheckKernel with the debug option set will output the training and test datasets for any failed tests.<p/> The <code>weka.classifiers.AbstractKernelTest</code> uses this class to test all the kernels. Any changes here, have to be checked in that abstract test class, too. <p/> <!-- options-start --> Valid options are: <p/> <pre> -D Turn on debugging output.</pre> <pre> -S Silent mode - prints nothing to stdout.</pre> <pre> -N <num> The number of instances in the datasets (default 20).</pre> <pre> -nominal <num> The number of nominal attributes (default 2).</pre> <pre> -nominal-values <num> The number of values for nominal attributes (default 1).</pre> <pre> -numeric <num> The number of numeric attributes (default 1).</pre> <pre> -string <num> The number of string attributes (default 1).</pre> <pre> -date <num> The number of date attributes (default 1).</pre> <pre> -relational <num> The number of relational attributes (default 1).</pre> <pre> -num-instances-relational <num> The number of instances in relational/bag attributes (default 10).</pre> <pre> -words <comma-separated-list> The words to use in string attributes.</pre> <pre> -word-separators <chars> The word separators to use in string attributes.</pre> <pre> -W Full name of the kernel analysed. eg: weka.classifiers.functions.supportVector.RBFKernel (default weka.classifiers.functions.supportVector.RBFKernel)</pre> <pre> Options specific to kernel weka.classifiers.functions.supportVector.RBFKernel: </pre> <pre> -D Enables debugging output (if available) to be printed. (default: off)</pre> <pre> -no-checks Turns off all checks - use with caution! (default: checks on)</pre> <pre> -C <num> The size of the cache (a prime number), 0 for full cache and -1 to turn it off. (default: 250007)</pre> <pre> -G <num> The Gamma parameter. (default: 0.01)</pre> <!-- options-end --> Options after -- are passed to the designated kernel.<p/><P><P><DL><DT><B>Version:</B></DT> <DD>$Revision: 1.3 $</DD><DT><B>Author:</B></DT> <DD>Len Trigg (trigg@cs.waikato.ac.nz), FracPete (fracpete at waikato dot ac dot nz)</DD><DT><B>See Also:</B><DD><A HREF="../../../../weka/core/TestInstances.html" title="class in weka.core"><CODE>TestInstances</CODE></A></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><A NAME="nested_class_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Nested Class Summary</B></FONT></TH></TR></TABLE> <A NAME="nested_classes_inherited_from_class_weka.core.CheckScheme"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TH ALIGN="left"><B>Nested classes/interfaces inherited from class weka.core.<A HREF="../../../../weka/core/CheckScheme.html" title="class in weka.core">CheckScheme</A></B></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../../weka/core/CheckScheme.PostProcessor.html" title="class in weka.core">CheckScheme.PostProcessor</A></CODE></TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../weka/classifiers/functions/supportVector/CheckKernel.html#CheckKernel()">CheckKernel</A></B>()</CODE><BR> </TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Method Summary</B></FONT></TH></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/classifiers/functions/supportVector/CheckKernel.html#doTests()">doTests</A></B>()</CODE><BR> Begin the tests, reporting results to System.out</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../../weka/classifiers/functions/supportVector/Kernel.html" title="class in weka.classifiers.functions.supportVector">Kernel</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/classifiers/functions/supportVector/CheckKernel.html#getKernel()">getKernel</A></B>()</CODE><BR> Get the kernel being tested</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/classifiers/functions/supportVector/CheckKernel.html#getOptions()">getOptions</A></B>()</CODE><BR> Gets the current settings of the CheckKernel.</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/classifiers/functions/supportVector/CheckKernel.html#getRevision()">getRevision</A></B>()</CODE><BR> Returns the revision string.</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/classifiers/functions/supportVector/CheckKernel.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/classifiers/functions/supportVector/CheckKernel.html#main(java.lang.String[])">main</A></B>(java.lang.String[] args)</CODE><BR>⌨️ 快捷键说明
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