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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 Mon Jul 14 01:36:39 CEST 2008 --><TITLE>MeasuredPerformance (RapidMiner Class Documentation)</TITLE><META NAME="keywords" CONTENT="com.rapidminer.operator.performance.MeasuredPerformance class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="MeasuredPerformance (RapidMiner Class Documentation)";}</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 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com.rapidminer.operator">com.rapidminer.operator.AbstractIOObject</A> <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../com/rapidminer/operator/ResultObjectAdapter.html" title="class in com.rapidminer.operator">com.rapidminer.operator.ResultObjectAdapter</A> <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../com/rapidminer/tools/math/Averagable.html" title="class in com.rapidminer.tools.math">com.rapidminer.tools.math.Averagable</A> <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../com/rapidminer/operator/performance/PerformanceCriterion.html" title="class in com.rapidminer.operator.performance">com.rapidminer.operator.performance.PerformanceCriterion</A> <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.rapidminer.operator.performance.MeasuredPerformance</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../com/rapidminer/operator/IOObject.html" title="interface in com.rapidminer.operator">IOObject</A>, <A HREF="../../../../com/rapidminer/operator/ResultObject.html" title="interface in com.rapidminer.operator">ResultObject</A>, <A HREF="../../../../com/rapidminer/operator/Saveable.html" title="interface in com.rapidminer.operator">Saveable</A>, <A HREF="../../../../com/rapidminer/report/Readable.html" title="interface in com.rapidminer.report">Readable</A>, <A HREF="../../../../com/rapidminer/report/Reportable.html" title="interface in com.rapidminer.report">Reportable</A>, <A HREF="../../../../com/rapidminer/tools/LoggingHandler.html" title="interface in com.rapidminer.tools">LoggingHandler</A>, java.io.Serializable, java.lang.Cloneable, java.lang.Comparable<<A HREF="../../../../com/rapidminer/operator/performance/PerformanceCriterion.html" title="class in com.rapidminer.operator.performance">PerformanceCriterion</A>></DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../com/rapidminer/operator/performance/AreaUnderCurve.html" title="class in com.rapidminer.operator.performance">AreaUnderCurve</A>, <A HREF="../../../../com/rapidminer/operator/performance/BinaryClassificationPerformance.html" title="class in com.rapidminer.operator.performance">BinaryClassificationPerformance</A>, <A HREF="../../../../com/rapidminer/operator/performance/cost/ClassificationCostCriterion.html" title="class in com.rapidminer.operator.performance.cost">ClassificationCostCriterion</A>, <A HREF="../../../../com/rapidminer/operator/performance/CorrelationCriterion.html" title="class in com.rapidminer.operator.performance">CorrelationCriterion</A>, <A HREF="../../../../com/rapidminer/operator/performance/CrossEntropy.html" title="class in com.rapidminer.operator.performance">CrossEntropy</A>, <A HREF="../../../../com/rapidminer/operator/performance/LogisticLoss.html" title="class in com.rapidminer.operator.performance">LogisticLoss</A>, <A HREF="../../../../com/rapidminer/operator/performance/Margin.html" title="class in com.rapidminer.operator.performance">Margin</A>, <A HREF="../../../../com/rapidminer/operator/performance/MDLCriterion.html" title="class in com.rapidminer.operator.performance">MDLCriterion</A>, <A HREF="../../../../com/rapidminer/operator/performance/MinMaxCriterion.html" title="class in com.rapidminer.operator.performance">MinMaxCriterion</A>, <A HREF="../../../../com/rapidminer/operator/performance/MultiClassificationPerformance.html" title="class in com.rapidminer.operator.performance">MultiClassificationPerformance</A>, <A HREF="../../../../com/rapidminer/operator/performance/NormalizedAbsoluteError.html" title="class in com.rapidminer.operator.performance">NormalizedAbsoluteError</A>, <A HREF="../../../../com/rapidminer/operator/performance/PredictionAverage.html" title="class in com.rapidminer.operator.performance">PredictionAverage</A>, <A HREF="../../../../com/rapidminer/operator/performance/PredictionTrendAccuracy.html" title="class in com.rapidminer.operator.performance">PredictionTrendAccuracy</A>, <A HREF="../../../../com/rapidminer/operator/performance/RankCorrelation.html" title="class in com.rapidminer.operator.performance">RankCorrelation</A>, <A HREF="../../../../com/rapidminer/operator/performance/RootRelativeSquaredError.html" title="class in com.rapidminer.operator.performance">RootRelativeSquaredError</A>, <A HREF="../../../../com/rapidminer/operator/performance/SimpleCriterion.html" title="class in com.rapidminer.operator.performance">SimpleCriterion</A>, <A HREF="../../../../com/rapidminer/operator/performance/SoftMarginLoss.html" title="class in com.rapidminer.operator.performance">SoftMarginLoss</A>, <A HREF="../../../../com/rapidminer/operator/performance/WeightedMultiClassPerformance.html" title="class in com.rapidminer.operator.performance">WeightedMultiClassPerformance</A></DD></DL><HR><DL><DT><PRE>public abstract class <B>MeasuredPerformance</B><DT>extends <A HREF="../../../../com/rapidminer/operator/performance/PerformanceCriterion.html" title="class in com.rapidminer.operator.performance">PerformanceCriterion</A></DL></PRE><P><p>Superclass for performance citeria that are actually measured (not estimated). These criteria can be calculated by the operator <A HREF="../../../../com/rapidminer/operator/performance/PerformanceEvaluator.html" title="class in com.rapidminer.operator.performance"><CODE>PerformanceEvaluator</CODE></A>.</p> <p>Beside the methods from <A HREF="../../../../com/rapidminer/tools/math/Averagable.html" title="class in com.rapidminer.tools.math"><CODE>Averagable</CODE></A> and <A HREF="../../../../com/rapidminer/operator/performance/PerformanceCriterion.html" title="class in com.rapidminer.operator.performance"><CODE>PerformanceCriterion</CODE></A> this class must implement some additonal methods. Please note that the actual measurement could be done in either <A HREF="../../../../com/rapidminer/operator/performance/MeasuredPerformance.html#countExample(com.rapidminer.example.Example)"><CODE>countExample(Example)</CODE></A> or in <A HREF="../../../../com/rapidminer/operator/performance/MeasuredPerformance.html#startCounting(com.rapidminer.example.ExampleSet)"><CODE>startCounting(ExampleSet)</CODE></A> but is does not need to be performed in both. In all cases where your measure needs to see the entire example set at one time, the actual computation of performance is done in startCounting and the countExample method returns without doing anything. For a performance measure that will be computed incrementally, you would do initialization in startCounting and updating in countExample. In all cases where an incremental calculation is possible the calculation and update in <A HREF="../../../../com/rapidminer/operator/performance/MeasuredPerformance.html#countExample(com.rapidminer.example.Example)"><CODE>countExample(Example)</CODE></A> is preferred since this would allow the easy integration of this criterion for incremental scenarios (although this is currently not supported).</p> <p>IMPORTANT: Please note that your criterion need a public constructor without arguments in order to create this object via reflection. It is also possible to have a one-argument string constructor taking a user defined parameter string. This is of course not necessary if your criterion does not handle any parameters. Another public one-argument constructor taking an object of the same class must also be provided (clone constructor). This constructor is used to copy the internal settings of a different instance of your measure into the current instance. If you were computing mean and the argument to cloneAverageable was an instance with mean nu and sample count n, you would set the mean of the current instance to nu and the sample count of the current instance to n. Don't forget to invoke the super constructor first in your clone constructor.</p> <p>The method <A HREF="../../../../com/rapidminer/tools/math/Averagable.html#getMikroAverage()"><CODE>Averagable.getMikroAverage()</CODE></A> should return the value computed in startCounting or the current value calculated by countExample or Double.NaN if the value was not yet known, or was not well defined). If you can calculate a value for micro variance you should return this value in <A HREF="../../../../com/rapidminer/tools/math/Averagable.html#getMikroVariance()"><CODE>Averagable.getMikroVariance()</CODE></A>. If this is not possible simply return Double.NaN.</p> <p>The method <A HREF="../../../../com/rapidminer/operator/performance/PerformanceCriterion.html#getExampleCount()"><CODE>PerformanceCriterion.getExampleCount()</CODE></A> returns the number of observations used to calculate the measure. This value is usually used for building micro averages (in the method <A HREF="../../../../com/rapidminer/tools/math/Averagable.html#buildSingleAverage(com.rapidminer.tools.math.Averagable)"><CODE>Averagable.buildSingleAverage(Averagable)</CODE></A> and might be important for calculating significance tests.</p> <p>If your measure is averageable, you use <A HREF="../../../../com/rapidminer/tools/math/Averagable.html#buildSingleAverage(com.rapidminer.tools.math.Averagable)"><CODE>Averagable.buildSingleAverage(Averagable)</CODE></A> to fold ⌨️ 快捷键说明
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