?? mathutil.html
字號:
<!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_03) on Thu Jun 30 16:40:16 CDT 2005 --><TITLE>MathUtil</TITLE><META NAME="keywords" CONTENT="MathUtil class"><LINK REL ="stylesheet" TYPE="text/css" HREF="stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="MathUtil";}</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="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> </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="MainMenu.html" title="class in <Unnamed>"><B>PREV CLASS</B></A> <A HREF="Matrix.html" title="class in <Unnamed>"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="index.html?MathUtil.html" target="_top"><B>FRAMES</B></A> <A HREF="MathUtil.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 | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | <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>Class MathUtil</H2><PRE>java.lang.Object <IMG SRC="./resources/inherit.gif" ALT="extended by "><B>MathUtil</B></PRE><HR><DL><DT><PRE>public class <B>MathUtil</B><DT>extends java.lang.Object</DL></PRE><P>class that round off floating point numbers to the specified number of decimal places givem<P><P><HR><P><!-- =========== FIELD SUMMARY =========== --><A NAME="field_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>Field Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static long</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#RAND_SEED">RAND_SEED</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static java.util.Random</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#random">random</A></B></CODE><BR> </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="MathUtil.html#MathUtil()">MathUtil</A></B>()</CODE><BR> Default constructor.</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 boolean</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#almostEqual(double, double)">almostEqual</A></B>(double val1, double val2)</CODE><BR> method sees if input doubles are "almost" equal</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static boolean</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#almostEqual(java.util.Vector, double)">almostEqual</A></B>(java.util.Vector vec1, double val2)</CODE><BR> method sees if input vectors are "almost" equal</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static boolean</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#almostEqual(java.util.Vector, java.util.Vector)">almostEqual</A></B>(java.util.Vector vec1, java.util.Vector vec2)</CODE><BR> method sees if input vectors are "almost" equal</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="MathUtil.html#betweenClass(DataPoints, Matrix, double, double)">betweenClass</A></B>(<A HREF="DataPoints.html" title="class in <Unnamed>">DataPoints</A> d, <A HREF="Matrix.html" title="class in <Unnamed>">Matrix</A> M, double rx_a, double ry_a)</CODE><BR> this method determines the between class scatter matrix for the class independent linear discrimination algorithm</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static MyPoint</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#computeClusterMean(java.util.Vector)">computeClusterMean</A></B>(java.util.Vector vec)</CODE><BR> methods computes and returns the mean of the given cluster</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static MyPoint</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#computeMyPointMean(java.util.Vector)">computeMyPointMean</A></B>(java.util.Vector vec)</CODE><BR> methods computes and returns the mean of the given cluster</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static MyPoint</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#computePointMean(java.util.Vector)">computePointMean</A></B>(java.util.Vector vec)</CODE><BR> methods computes and returns the mean of the given cluster</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="MathUtil.html#copyVector(java.util.Vector, java.util.Vector, int, int, int)">copyVector</A></B>(java.util.Vector<java.lang.Double> vec1_a, java.util.Vector<java.lang.Double> vec2_a, int length_a, int index1_a, int index2_a)</CODE><BR> Copies vector given specific parameters</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static double</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#distance(double, double, double, double)">distance</A></B>(double x1, double y1, double x2, double y2)</CODE><BR> calculate the euclidean distance between the two points</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static double</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#doubleValue(java.util.Vector, int)">doubleValue</A></B>(java.util.Vector<java.lang.Double> vec_a, int index_a)</CODE><BR> gets the double value of the input vector at the index passed</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static double</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#grand(double, double)">grand</A></B>(double mean, double stddev)</CODE><BR> method generates a random distribution centered about the mean with a variance that is specified by the standard deviation.</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="MathUtil.html#initDoubleVector(java.util.Vector, double)">initDoubleVector</A></B>(java.util.Vector<java.lang.Double> vec_a, double value_a)</CODE><BR> initializes components of vector to double value passed</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static double</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#linearKernel(java.util.Vector, java.util.Vector)">linearKernel</A></B>(java.util.Vector point1, java.util.Vector point2)</CODE><BR> this method evaluates the linear Kernel on the input vectors K(x,y) = (x .</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static double</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#polynomialKernel(java.util.Vector, java.util.Vector)">polynomialKernel</A></B>(java.util.Vector points1, java.util.Vector points2)</CODE><BR> this method evaluates the second degree polynomial Kernel on the input vectors K(x,y) = (x .</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static double</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#rbfKernel(java.util.Vector, java.util.Vector)">rbfKernel</A></B>(java.util.Vector point1, java.util.Vector point2)</CODE><BR> this method evaluates the redial basis function Kernel on the input vectors with standard deviation sigma K(x,y) = exp(-gamma * ((a.a)-2*(a.b)+(b.b)))</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static double</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#rbfKernel(java.util.Vector, java.util.Vector, double)">rbfKernel</A></B>(java.util.Vector point1, java.util.Vector point2, double gamma_a)</CODE><BR> this method evaluates the redial basis function Kernel on the input vectors with standard deviation sigma K(x,y) = exp(-gamma * ((a.a)-2*(a.b)+(b.b)))</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static double</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#setDecimal(double, int)">setDecimal</A></B>(double doubleNumber, int decimalPlaces)</CODE><BR> method takes in a decimal number and rounds to the given number of decimal places passed</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static double</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#SetDecimal(double, int)">SetDecimal</A></B>(double doubleNumber, int decimalPlaces)</CODE><BR> method to round off floating point numbers to the specified number of decimal places given</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static double</CODE></FONT></TD><TD><CODE><B><A HREF="MathUtil.html#vectorProduct(java.util.Vector, java.util.Vector)">vectorProduct</A></B>(java.util.Vector vec1, java.util.Vector vec2)</CODE><BR> this method evaluates the vector dot product</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="MathUtil.html#withinClass(DataPoints, double, double)">withinClass</A></B>(<A HREF="DataPoints.html" title="class in <Unnamed>">DataPoints</A> data_a, double rx_a, double ry_a)</CODE><BR> Within Class</TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></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.lang.Object</B></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><A NAME="field_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"><B>Field Detail</B></FONT></TH></TR></TABLE><A NAME="RAND_SEED"><!-- --></A><H3>RAND_SEED</H3><PRE>public static final long <B>RAND_SEED</B></PRE><DL><DL><DT><B>See Also:</B><DD><A HREF="constant-values.html#MathUtil.RAND_SEED">Constant Field Values</A></DL></DL><HR><A NAME="random"><!-- --></A><H3>random</H3><PRE>public static final java.util.Random <B>random</B></PRE><DL><DL></DL></DL><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -