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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 01:36:40 CEST 2008 --><TITLE>PredictionTrendAccuracy (RapidMiner Class Documentation)</TITLE><META NAME="keywords" CONTENT="com.rapidminer.operator.performance.PredictionTrendAccuracy class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="PredictionTrendAccuracy (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 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="class-use/PredictionTrendAccuracy.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </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="../../../../com/rapidminer/operator/performance/PredictionAverage.html" title="class in com.rapidminer.operator.performance"><B>PREV CLASS</B></A> <A HREF="../../../../com/rapidminer/operator/performance/RankCorrelation.html" title="class in com.rapidminer.operator.performance"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html?com/rapidminer/operator/performance/PredictionTrendAccuracy.html" target="_top"><B>FRAMES</B></A> <A HREF="PredictionTrendAccuracy.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">com.rapidminer.operator.performance</FONT><BR>Class PredictionTrendAccuracy</H2><PRE>java.lang.Object <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../com/rapidminer/operator/AbstractIOObject.html" title="class in 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 "><A HREF="../../../../com/rapidminer/operator/performance/MeasuredPerformance.html" title="class in com.rapidminer.operator.performance">com.rapidminer.operator.performance.MeasuredPerformance</A> <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.rapidminer.operator.performance.PredictionTrendAccuracy</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><HR><DL><DT><PRE>public class <B>PredictionTrendAccuracy</B><DT>extends <A HREF="../../../../com/rapidminer/operator/performance/MeasuredPerformance.html" title="class in com.rapidminer.operator.performance">MeasuredPerformance</A></DL></PRE><P><p>Measures the number of times a regression prediction correctly determines the trend. This performance measure assumes that the attributes of each example represents the values of a time window, the label is a value after a certain horizon which should be predicted. All examples build a consecutive series description, i.e. the labels of all examples build the series itself (this is, for example, the case for a windowing step size of 1). This format will be delivered by the Series2ExampleSet operators provided by RapidMiner.</p> <p>Example: Lets think of a series v1...v10 and a sliding window with window width 3, step size 1 and prediction horizon 1. The resulting example set is then</p> <pre> T1 T2 T3 L P --------------- v1 v2 v3 v4 p1 v2 v3 v4 v5 p2 v3 v4 v5 v6 p3 v4 v5 v6 v7 p4 v5 v6 v7 v8 p5 v6 v7 v8 v9 p6 v7 v8 v9 v10 p7 </pre> <p>The second last column (L) corresponds to the label, i.e. the value which should be predicted and the last column (P) corresponds to the predictions. The columns T1, T2, and T3 correspond to the regular attributes, i.e. the points which should be used as learning input.</p> <p>This performance measure then calculates the actuals trend between the last time point in the series (T3 here) and the actual label (L) and compares it to the trend between T3 and the prediction (P), sums the products between both trends, and divides this sum by the total number of examples, i.e. [(v4-v3)*(p1-v3)+(v5-v4)*(p2-v4)+...] / 7 in this example.</p><P><P><DL><DT><B>Version:</B></DT> <DD>$Id: PredictionTrendAccuracy.java,v 1.5 2008/05/09 19:22:43 ingomierswa Exp $</DD><DT><B>Author:</B></DT> <DD>Ingo Mierswa</DD><DT><B>See Also:</B><DD><A HREF="../../../../serialized-form.html#com.rapidminer.operator.performance.PredictionTrendAccuracy">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="../../../../com/rapidminer/operator/performance/PredictionTrendAccuracy.html#PredictionTrendAccuracy()">PredictionTrendAccuracy</A></B>()</CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../com/rapidminer/operator/performance/PredictionTrendAccuracy.html#PredictionTrendAccuracy(com.rapidminer.operator.performance.PredictionTrendAccuracy)">PredictionTrendAccuracy</A></B>(<A HREF="../../../../com/rapidminer/operator/performance/PredictionTrendAccuracy.html" title="class in com.rapidminer.operator.performance">PredictionTrendAccuracy</A> pta)</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="../../../../com/rapidminer/operator/performance/PredictionTrendAccuracy.html#buildSingleAverage(com.rapidminer.tools.math.Averagable)">buildSingleAverage</A></B>(<A HREF="../../../../com/rapidminer/tools/math/Averagable.html" title="class in com.rapidminer.tools.math">Averagable</A> averagable)</CODE><BR> This method should build the average of this and another averagable of the same type.</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="../../../../com/rapidminer/operator/performance/PredictionTrendAccuracy.html#countExample(com.rapidminer.example.Example)">countExample</A></B>(<A HREF="../../../../com/rapidminer/example/Example.html" title="class in com.rapidminer.example">Example</A> example)</CODE><BR> Counts a single example, e.g. by summing up errors.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.String</CODE></FONT></TD>⌨️ 快捷键说明
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