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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 01:36:50 CEST 2008 --><TITLE>RandomGenerator (RapidMiner Class Documentation)</TITLE><META NAME="keywords" CONTENT="com.rapidminer.tools.RandomGenerator class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="RandomGenerator (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/RandomGenerator.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/tools/ParameterService.html" title="class in com.rapidminer.tools"><B>PREV CLASS</B></A> <A HREF="../../../com/rapidminer/tools/ResourceSource.html" title="class in com.rapidminer.tools"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?com/rapidminer/tools/RandomGenerator.html" target="_top"><B>FRAMES</B></A> <A HREF="RandomGenerator.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.tools</FONT><BR>Class RandomGenerator</H2><PRE>java.lang.Object <IMG SRC="../../../resources/inherit.gif" ALT="extended by ">java.util.Random <IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>com.rapidminer.tools.RandomGenerator</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>java.io.Serializable</DD></DL><HR><DL><DT><PRE>public class <B>RandomGenerator</B><DT>extends java.util.Random</DL></PRE><P>The global random number generator. This should be used for all random purposes of RapidMiner to ensure that two runs of the same process setup provide the same results.<P><P><DL><DT><B>Version:</B></DT> <DD>$Id: RandomGenerator.java,v 1.8 2008/05/09 19:22:55 ingomierswa Exp $</DD><DT><B>Author:</B></DT> <DD>Ralf Klinkenberg, Ingo Mierswa</DD><DT><B>See Also:</B><DD><A HREF="../../../serialized-form.html#com.rapidminer.tools.RandomGenerator">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/tools/RandomGenerator.html#RandomGenerator(long)">RandomGenerator</A></B>(long seed)</CODE><BR> Initializes the random number generator with the given <code>seed</code></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>static <A HREF="../../../com/rapidminer/tools/RandomGenerator.html" title="class in com.rapidminer.tools">RandomGenerator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../com/rapidminer/tools/RandomGenerator.html#getGlobalRandomGenerator()">getGlobalRandomGenerator</A></B>()</CODE><BR> Returns the global random number generator.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../com/rapidminer/tools/RandomGenerator.html" title="class in com.rapidminer.tools">RandomGenerator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../com/rapidminer/tools/RandomGenerator.html#getRandomGenerator(int)">getRandomGenerator</A></B>(int seed)</CODE><BR> Returns the global random number generator if the seed is negative and a new RandomGenerator with the given seed if the seed is positive or zero.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../com/rapidminer/tools/RandomGenerator.html" title="class in com.rapidminer.tools">RandomGenerator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../com/rapidminer/tools/RandomGenerator.html#getRandomGenerator(com.rapidminer.Process, int)">getRandomGenerator</A></B>(<A HREF="../../../com/rapidminer/Process.html" title="class in com.rapidminer">Process</A> process, int seed)</CODE><BR> Returns the global random number generator if the seed is negative and a new RandomGenerator with the given seed if the seed is positive or zero.</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="../../../com/rapidminer/tools/RandomGenerator.html#init(com.rapidminer.Process)">init</A></B>(<A HREF="../../../com/rapidminer/Process.html" title="class in com.rapidminer">Process</A> process)</CODE><BR> Instantiates the global random number generator and initializes it with the random number generator seed specified in the <code>global</code> section of the configuration file.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> double</CODE></FONT></TD><TD><CODE><B><A HREF="../../../com/rapidminer/tools/RandomGenerator.html#nextDoubleInRange(double, double)">nextDoubleInRange</A></B>(double lowerBound, double upperBound)</CODE><BR> Returns the next pseudorandom, uniformly distributed <code>double</code> value between <code>lowerBound</code> and <code>upperBound</code> from this random number generator's sequence (exclusive of the interval endpoint values).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../com/rapidminer/tools/RandomGenerator.html#nextIntInRange(int, int)">nextIntInRange</A></B>(int lowerBound, int upperBound)</CODE><BR> Returns the next pseudorandom, uniformly distributed <code>int</code> value between <code>lowerBound</code> and <code>upperBound</code> from this random number generator's sequence (lower bound inclusive, upper bout exclusive).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> long</CODE></FONT></TD><TD><CODE><B><A HREF="../../../com/rapidminer/tools/RandomGenerator.html#nextLongInRange(long, long)">nextLongInRange</A></B>(long lowerBound, long upperBound)</CODE><BR> returns the next pseudorandom, uniformly distributed <code>long</code> value between <code>lowerBound</code> and <code>upperBound</code> from this random number generator's sequence (exclusive of the interval endpoint values).</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="../../../com/rapidminer/tools/RandomGenerator.html#nextString(int)">nextString</A></B>(int length)</CODE><BR> Returns a random String of the given length.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../com/rapidminer/tools/RandomGenerator.html#randomIndex(double[])">randomIndex</A></B>(double[] probs)</CODE><BR> Returns a randomly selected integer between 0 and the length of the given array.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.util.Random"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TH ALIGN="left"><B>Methods inherited from class java.util.Random</B></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>next, nextBoolean, nextBytes, nextDouble, nextFloat, nextGaussian, nextInt, nextInt, nextLong, setSeed</CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>⌨️ 快捷键说明
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