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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_10) on Fri Jan 26 16:34:51 NZDT 2007 --><TITLE>Estimator</TITLE><META NAME="keywords" CONTENT="weka.estimators.Estimator class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="Estimator";}</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/estimators/DNConditionalEstimator.html" title="class in weka.estimators"><B>PREV CLASS</B></A> <A HREF="../../weka/estimators/EstimatorUtils.html" title="class in weka.estimators"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html?weka/estimators/Estimator.html" target="_top"><B>FRAMES</B></A> <A HREF="Estimator.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: NESTED | 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.estimators</FONT><BR>Class Estimator</H2><PRE>java.lang.Object <IMG SRC="../../resources/inherit.gif" ALT="extended by "><B>weka.estimators.Estimator</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>java.io.Serializable, java.lang.Cloneable, <A HREF="../../weka/core/CapabilitiesHandler.html" title="interface in weka.core">CapabilitiesHandler</A>, <A HREF="../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../weka/estimators/DiscreteEstimator.html" title="class in weka.estimators">DiscreteEstimator</A>, <A HREF="../../weka/classifiers/bayes/net/estimate/DiscreteEstimatorBayes.html" title="class in weka.classifiers.bayes.net.estimate">DiscreteEstimatorBayes</A>, <A HREF="../../weka/estimators/KernelEstimator.html" title="class in weka.estimators">KernelEstimator</A>, <A HREF="../../weka/estimators/MahalanobisEstimator.html" title="class in weka.estimators">MahalanobisEstimator</A>, <A HREF="../../weka/estimators/NormalEstimator.html" title="class in weka.estimators">NormalEstimator</A>, <A HREF="../../weka/estimators/PoissonEstimator.html" title="class in weka.estimators">PoissonEstimator</A></DD></DL><HR><DL><DT><PRE>public abstract class <B>Estimator</B><DT>extends java.lang.Object<DT>implements java.lang.Cloneable, java.io.Serializable, <A HREF="../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A>, <A HREF="../../weka/core/CapabilitiesHandler.html" title="interface in weka.core">CapabilitiesHandler</A></DL></PRE><P>Abstract class for all estimators. Example code for a nonincremental estimator <code> <pre> // create a histogram for estimation EqualWidthEstimator est = new EqualWidthEstimator(); est.addValues(instances, attrIndex); </pre> </code> Example code for an incremental estimator (incremental estimators must implement interface IncrementalEstimator) <code> <pre> // Create a discrete estimator that takes values 0 to 9 DiscreteEstimator newEst = new DiscreteEstimator(10, true); // Create 50 random integers first predicting the probability of the // value, then adding the value to the estimator Random r = new Random(seed); for(int i = 0; i < 50; i++) { current = Math.abs(r.nextInt() % 10); System.out.println(newEst); System.out.println("Prediction for " + current + " = " + newEst.getProbability(current)); newEst.addValue(current, 1); } </pre> </code> Example code for a main method for an estimator.<p> <code> <pre> public static void main(String [] argv) { try { LoglikeliEstimator est = new LoglikeliEstimator(); Estimator.buildEstimator((Estimator) est, argv, false); System.out.println(est.toString()); } catch (Exception ex) { ex.printStackTrace(); System.out.println(ex.getMessage()); } } </pre> </code><P><P><DL><DT><B>Version:</B></DT> <DD>$Revision: 1.7 $</DD><DT><B>Author:</B></DT> <DD>Gabi Schmidberger (gabi@cs.waikato.ac.nz), Len Trigg (trigg@cs.waikato.ac.nz)</DD><DT><B>See Also:</B><DD><A HREF="../../serialized-form.html#weka.estimators.Estimator">Serialized Form</A></DL><HR><P><!-- ======== 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/estimators/Estimator.html#Estimator()">Estimator</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/estimators/Estimator.html#addValue(double, double)">addValue</A></B>(double data, double weight)</CODE><BR> Add a new data value to the current estimator.</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/estimators/Estimator.html#addValues(weka.core.Instances, int)">addValues</A></B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> data, int attrIndex)</CODE><BR> Initialize the estimator with a new dataset.</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/estimators/Estimator.html#addValues(weka.core.Instances, int, double, double, double)">addValues</A></B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> data, int attrIndex, double min, double max, double factor)</CODE><BR> Initialize the estimator with all values of one attribute of a dataset.</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/estimators/Estimator.html#addValues(weka.core.Instances, int, int, int)">addValues</A></B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> data, int attrIndex, int classIndex, int classValue)</CODE><BR> Initialize the estimator using only the instance of one 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/estimators/Estimator.html#addValues(weka.core.Instances, int, int, int, double, double)">addValues</A></B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> data, int attrIndex, int classIndex, int classValue, double min, double max)</CODE><BR> Initialize the estimator using only the instance of one class.</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/estimators/Estimator.html#buildEstimator(weka.estimators.Estimator, weka.core.Instances, int, int, int, boolean)">buildEstimator</A></B>(<A HREF="../../weka/estimators/Estimator.html" title="class in weka.estimators">Estimator</A> est, <A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> instances, int attrIndex, int classIndex, int classValueIndex, boolean isIncremental)</CODE><BR> </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/estimators/Estimator.html#buildEstimator(weka.estimators.Estimator, java.lang.String[], boolean)">buildEstimator</A></B>(<A HREF="../../weka/estimators/Estimator.html" title="class in weka.estimators">Estimator</A> est, java.lang.String[] options, boolean isIncremental)</CODE><BR> Build an estimator using the options.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../weka/estimators/Estimator.html" title="class in weka.estimators">Estimator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/estimators/Estimator.html#clone(weka.estimators.Estimator)">clone</A></B>(<A HREF="../../weka/estimators/Estimator.html" title="class in weka.estimators">Estimator</A> model)</CODE><BR> Creates a deep copy of the given estimator using serialization.</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/estimators/Estimator.html#debugTipText()">debugTipText</A></B>()</CODE><BR> Returns the tip text for this property</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/estimators/Estimator.html#equals(java.lang.Object)">equals</A></B>(java.lang.Object obj)</CODE><BR> Tests whether the current estimation object is equal to another estimation object</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../weka/estimators/Estimator.html" title="class in weka.estimators">Estimator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/estimators/Estimator.html#forName(java.lang.String, java.lang.String[])">forName</A></B>(java.lang.String name, java.lang.String[] options)</CODE><BR> Creates a new instance of a estimatorr given it's class name and (optional) arguments to pass to it's setOptions method.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../weka/core/Capabilities.html" title="class in weka.core">Capabilities</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/estimators/Estimator.html#getCapabilities()">getCapabilities</A></B>()</CODE>⌨️ 快捷键说明
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