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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Wed Sep 04 10:31:49 CDT 2002 --><TITLE>: Class Matrix</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <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 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<A HREF="Matrix.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | 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><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">weka.classifiers.m5</FONT><BR>Class Matrix</H2><PRE>java.lang.Object | +--<B>weka.classifiers.m5.Matrix</B></PRE><HR><DL><DT>public final class <B>Matrix</B><DT>extends java.lang.Object</DL><P>Class for handling a matrix<P><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../weka/classifiers/m5/Matrix.html#Matrix(int, int)">Matrix</A></B>(int nr, int nc)</CODE><BR> Constructs a matrix</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></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/classifiers/m5/Matrix.html#lubksb(int, int[], double[])">lubksb</A></B>(int n, int[] indx, double[] b)</CODE><BR> LU backward substitution</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="../../../weka/classifiers/m5/Matrix.html#ludcmp(int, int[])">ludcmp</A></B>(int n, int[] indx)</CODE><BR> LU decomposition</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../weka/classifiers/m5/Matrix.html">Matrix</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../weka/classifiers/m5/Matrix.html#multiply(weka.classifiers.m5.Matrix, int, int, int)">multiply</A></B>(<A HREF="../../../weka/classifiers/m5/Matrix.html">Matrix</A> b, int l, int m, int n)</CODE><BR> Reurns the multiplication of two matrices</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="../../../weka/classifiers/m5/Matrix.html#regression(weka.classifiers.m5.Matrix, int, int)">regression</A></B>(<A HREF="../../../weka/classifiers/m5/Matrix.html">Matrix</A> y, int n, int m)</CODE><BR> Linear regression</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/classifiers/m5/Matrix.html#toString(int, int, int, int)">toString</A></B>(int nrl, int nrh, int ncl, int nch)</CODE><BR> Converts a matrix to a string</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../weka/classifiers/m5/Matrix.html">Matrix</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../weka/classifiers/m5/Matrix.html#transpose(int, int)">transpose</A></B>(int n, int m)</CODE><BR> Returns the transpose of a matrix [0:n-1][0:m-1]</TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.lang.Object</B></TD></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 =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Constructor Detail</B></FONT></TD></TR></TABLE><A NAME="Matrix(int, int)"><!-- --></A><H3>Matrix</H3><PRE>public <B>Matrix</B>(int nr, int nc)</PRE><DL><DD>Constructs a matrix<DD><DL><DT><B>Parameters:</B><DD><CODE>nr</CODE> - the number of the rows<DD><CODE>nc</CODE> - the number of the columns</DL></DD></DL><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Method Detail</B></FONT></TD></TR></TABLE><A NAME="toString(int, int, int, int)"><!-- --></A><H3>toString</H3><PRE>public final java.lang.String <B>toString</B>(int nrl, int nrh, int ncl, int nch)</PRE><DL><DD>Converts a matrix to a string<DD><DL><DT><B>Parameters:</B><DD><CODE>nrl</CODE> - the smallest index of the rows<DD><CODE>nrh</CODE> - the largest index of the rows<DD><CODE>ncl</CODE> - the smallest index of the column<DD><CODE>ncl</CODE> - the largest index of the column<DT><B>Returns:</B><DD>the converted string</DL></DD></DL><HR><A NAME="transpose(int, int)"><!-- --></A><H3>transpose</H3><PRE>public final <A HREF="../../../weka/classifiers/m5/Matrix.html">Matrix</A> <B>transpose</B>(int n, int m)</PRE><DL><DD>Returns the transpose of a matrix [0:n-1][0:m-1]<DD><DL><DT><B>Parameters:</B><DD><CODE>n</CODE> - the number of rows<DD><CODE>m</CODE> - the number of columns<DT><B>Returns:</B><DD>the transposed matrix</DL></DD></DL><HR><A NAME="multiply(weka.classifiers.m5.Matrix, int, int, int)"><!-- --></A><H3>multiply</H3><PRE>public final <A HREF="../../../weka/classifiers/m5/Matrix.html">Matrix</A> <B>multiply</B>(<A HREF="../../../weka/classifiers/m5/Matrix.html">Matrix</A> b, int l, int m, int n)</PRE><DL><DD>Reurns the multiplication of two matrices<DD><DL><DT><B>Parameters:</B><DD><CODE>b</CODE> - the multiplication matrix<DD><CODE>l</CODE> - the number of the rows of the instance matrix<DD><CODE>m</CODE> - the number of the columns of the instance matrix, and the number of the rows of matrix b<DD><CODE>n</CODE> - the number of the columns of matrix b<DT><B>Returns:</B><DD>the product matrix</DL></DD></DL><HR><A NAME="regression(weka.classifiers.m5.Matrix, int, int)"><!-- --></A><H3>regression</H3><PRE>public final double[] <B>regression</B>(<A HREF="../../../weka/classifiers/m5/Matrix.html">Matrix</A> y, int n, int m)</PRE><DL><DD>Linear regression<DD><DL><DT><B>Parameters:</B><DD><CODE>y</CODE> - the dependent variable vector<DD><CODE>n</CODE> - the number of the observations<DD><CODE>m</CODE> - the number of the coefficients<DT><B>Returns:</B><DD>the coefficients</DL></DD></DL><HR><A NAME="lubksb(int, int[], double[])"><!-- --></A><H3>lubksb</H3><PRE>public final void <B>lubksb</B>(int n, int[] indx, double[] b)</PRE><DL><DD>LU backward substitution<DD><DL><DT><B>Parameters:</B><DD><CODE>n</CODE> - the number of the coefficients<DD><CODE>indx</CODE> - the index<DD><CODE>b</CODE> - the double vector, storing constant terms in the equation sets; it later stores the computed coefficients' values</DL></DD></DL><HR><A NAME="ludcmp(int, int[])"><!-- --></A><H3>ludcmp</H3><PRE>public final int[] <B>ludcmp</B>(int n, int[] indx)</PRE><DL><DD>LU decomposition<DD><DL><DT><B>Parameters:</B><DD><CODE>n</CODE> - the number of coefficients<DD><CODE>indx</CODE> - the index<DT><B>Returns:</B><DD>the integer vector of the attributes's singularities</DL></DD></DL><!-- ========= END OF CLASS DATA ========= --><HR><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_bottom"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <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 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