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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 15:48:36 NZST 2008 --><TITLE>CheckClassifier</TITLE><META NAME="keywords" CONTENT="weka.classifiers.CheckClassifier class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="CheckClassifier";}</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/BVDecomposeSegCVSub.html" title="class in weka.classifiers"><B>PREV CLASS</B></A> <A HREF="../../weka/classifiers/CheckSource.html" title="class in weka.classifiers"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html?weka/classifiers/CheckClassifier.html" target="_top"><B>FRAMES</B></A> <A HREF="CheckClassifier.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</FONT><BR>Class CheckClassifier</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.CheckClassifier</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>CheckClassifier</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 classifiers. If you implement a classifier 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 classifier don't exist, but this will help find some common ones. <p/> Typical usage: <p/> <code>java weka.classifiers.CheckClassifier -W classifier_name classifier_options </code><p/> CheckClassifier reports on the following: <ul> <li> Classifier abilities <ul> <li> Possible command line options to the classifier </li> <li> Whether the classifier can predict nominal, numeric, string, date or relational class attributes. Warnings will be displayed if performance is worse than ZeroR </li> <li> Whether the classifier can be trained incrementally </li> <li> Whether the classifier can handle numeric predictor attributes </li> <li> Whether the classifier can handle nominal predictor attributes </li> <li> Whether the classifier can handle string predictor attributes </li> <li> Whether the classifier can handle date predictor attributes </li> <li> Whether the classifier can handle relational predictor attributes </li> <li> Whether the classifier can handle multi-instance data </li> <li> Whether the classifier can handle missing predictor values </li> <li> Whether the classifier can handle missing class values </li> <li> Whether a nominal classifier only handles 2 class problems </li> <li> Whether the classifier can handle instance weights </li> </ul> </li> <li> Correct functioning <ul> <li> Correct initialisation during buildClassifier (i.e. no result changes when buildClassifier called repeatedly) </li> <li> Whether incremental training produces the same results as during non-incremental training (which may or may not be OK) </li> <li> Whether the classifier alters the data pased to it (number of instances, instance order, instance weights, etc) </li> <li> Whether the toString() method works correctly before the classifier has been built. </li> </ul> </li> <li> Degenerate cases <ul> <li> building classifier 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 CheckClassifier with the debug option set will output the training and test datasets for any failed tests.<p/> The <code>weka.classifiers.AbstractClassifierTest</code> uses this class to test all the classifiers. 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 classifier analysed. eg: weka.classifiers.bayes.NaiveBayes (default weka.classifiers.rules.ZeroR)</pre> <pre> Options specific to classifier weka.classifiers.rules.ZeroR: </pre> <pre> -D If set, classifier is run in debug mode and may output additional info to the console</pre> <!-- options-end --> Options after -- are passed to the designated classifier.<p/><P><P><DL><DT><B>Version:</B></DT> <DD>$Revision: 1.33 $</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/CheckClassifier.html#CheckClassifier()">CheckClassifier</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/CheckClassifier.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/Classifier.html" title="class in weka.classifiers">Classifier</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/classifiers/CheckClassifier.html#getClassifier()">getClassifier</A></B>()</CODE><BR> Get the classifier used as the classifier</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/CheckClassifier.html#getOptions()">getOptions</A></B>()</CODE><BR> Gets the current settings of the CheckClassifier.</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/CheckClassifier.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/CheckClassifier.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">⌨️ 快捷键说明
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