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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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DoubleFactory2D (Colt 1.2.0 - API Specification)
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cern.colt.matrix</FONT>
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Class DoubleFactory2D</H2>
<PRE>
<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A>
  <IMG SRC="../../../resources/inherit.gif" ALT="extended by"><A HREF="../../../cern/colt/PersistentObject.html" title="class in cern.colt">cern.colt.PersistentObject</A>
      <IMG SRC="../../../resources/inherit.gif" ALT="extended by"><B>cern.colt.matrix.DoubleFactory2D</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Cloneable.html" title="class or interface in java.lang">Cloneable</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/Serializable.html" title="class or interface in java.io">Serializable</A></DD>
</DL>
<HR>
<DL>
<DT>public class <B>DoubleFactory2D</B><DT>extends <A HREF="../../../cern/colt/PersistentObject.html" title="class in cern.colt">PersistentObject</A></DL>

<P>
Factory for convenient construction of 2-d matrices holding <tt>double</tt> 
  cells. Also provides convenient methods to compose (concatenate) and decompose 
  (split) matrices from/to constituent blocks. </p>
<p>&nbsp; </p>
<table border="0" cellspacing="0">
  <tr align="left" valign="top"> 
        <td><i>Construction</i></td>
        <td>Use idioms like <tt>DoubleFactory2D.dense.make(4,4)</tt> to construct 
          dense matrices, <tt>DoubleFactory2D.sparse.make(4,4)</tt> to construct sparse 
          matrices.</td>
  </tr>
  <tr align="left" valign="top"> 
        <td><i> Construction with initial values </i></td>
        <td>Use other <tt>make</tt> methods to construct matrices with given initial 
          values. </td>
  </tr>
  <tr align="left" valign="top"> 
        <td><i> Appending rows and columns </i></td>
        <td>Use methods <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#appendColumns(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D)"><CODE>appendColumns</CODE></A>, 
          <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#appendColumns(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D)"><CODE>appendRows</CODE></A> and <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#repeat(cern.colt.matrix.DoubleMatrix2D, int, int)"><CODE>repeat</CODE></A> to append rows and columns. </td>
  </tr>
  <tr align="left" valign="top"> 
        <td><i> General block matrices </i></td>
        <td>Use methods <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#compose(cern.colt.matrix.DoubleMatrix2D[][])"><CODE>compose</CODE></A> and <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#decompose(cern.colt.matrix.DoubleMatrix2D[][], cern.colt.matrix.DoubleMatrix2D)"><CODE>decompose</CODE></A> to work with general block matrices. </td>
  </tr>
  <tr align="left" valign="top"> 
        <td><i> Diagonal matrices </i></td>
        <td>Use methods <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#diagonal(cern.colt.matrix.DoubleMatrix1D)"><CODE>diagonal(vector)</CODE></A>, <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#diagonal(cern.colt.matrix.DoubleMatrix2D)"><CODE>diagonal(matrix)</CODE></A> and <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#identity(int)"><CODE>identity</CODE></A> 
          to work with diagonal matrices. </td>
  </tr>
  <tr align="left" valign="top"> 
        <td><i> Diagonal block matrices </i></td>
        <td>Use method <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#composeDiagonal(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D)"><CODE>composeDiagonal</CODE></A> to work with diagonal block matrices. </td>
  </tr>
  <tr align="left" valign="top"> 
        <td><i>Random</i></td>
        <td>Use methods <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#random(int, int)"><CODE>random</CODE></A> and <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#sample(int, int, double, double)"><CODE>sample</CODE></A> to construct random matrices. </td>
  </tr>
</table>
<p>&nbsp;</p>
<p>If the factory is used frequently it might be useful to streamline the notation. 
  For example by aliasing: </p>
<table>
  <td class="PRE"> 
        <pre>
DoubleFactory2D F = DoubleFactory2D.dense;
F.make(4,4);
F.descending(10,20);
F.random(4,4);
...
</pre>
  </td>
</table>
<P>

<P>
<DL>
<DT><B>Version:</B></DT>
  <DD>1.0, 09/24/99</DD>
<DT><B>See Also:</B><DD><A HREF="../../../serialized-form.html#cern.colt.matrix.DoubleFactory2D">Serialized Form</A></DL>
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<!-- ======== NESTED CLASS SUMMARY ======== -->


<!-- =========== FIELD SUMMARY =========== -->

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<B>Field Summary</B></FONT></TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="../../../cern/colt/matrix/DoubleFactory2D.html" title="class in cern.colt.matrix">DoubleFactory2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#dense">dense</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A factory producing dense matrices.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="../../../cern/colt/matrix/DoubleFactory2D.html" title="class in cern.colt.matrix">DoubleFactory2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#rowCompressed">rowCompressed</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A factory producing sparse row compressed matrices.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="../../../cern/colt/matrix/DoubleFactory2D.html" title="class in cern.colt.matrix">DoubleFactory2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#sparse">sparse</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A factory producing sparse hash matrices.</TD>
</TR>
</TABLE>
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<TD><B>Fields inherited from class cern.colt.<A HREF="../../../cern/colt/PersistentObject.html" title="class in cern.colt">PersistentObject</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../cern/colt/PersistentObject.html#serialVersionUID">serialVersionUID</A></CODE></TD>
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</TABLE>
&nbsp;
<!-- ======== CONSTRUCTOR SUMMARY ======== -->


<!-- ========== METHOD SUMMARY =========== -->

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<B>Method Summary</B></FONT></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#appendColumns(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D)">appendColumns</A></B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;A,
              <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;B)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;C = A||B; Constructs a new matrix which is the column-wise concatenation of two other matrices.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#appendRows(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D)">appendRows</A></B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;A,
           <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;B)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;C = A||B; Constructs a new matrix which is the row-wise concatenation of two other matrices.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#ascending(int, int)">ascending</A></B>(int&nbsp;rows,
          int&nbsp;columns)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a matrix with cells having ascending values.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#compose(cern.colt.matrix.DoubleMatrix2D[][])">compose</A></B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>[][]&nbsp;parts)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a block matrix made from the given parts.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#composeDiagonal(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D)">composeDiagonal</A></B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;A,
                <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;B)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a diagonal block matrix from the given parts (the <i>direct sum</i> of two matrices).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#composeDiagonal(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D)">composeDiagonal</A></B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;A,
                <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;B,
                <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;C)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a diagonal block matrix from the given parts.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#decompose(cern.colt.matrix.DoubleMatrix2D[][], cern.colt.matrix.DoubleMatrix2D)">decompose</A></B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>[][]&nbsp;parts,
          <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;matrix)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Splits a block matrix into its constituent blocks; Copies blocks of a matrix into the given parts.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#demo1()">demo1</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Demonstrates usage of this class.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#demo2()">demo2</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Demonstrates usage of this class.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#descending(int, int)">descending</A></B>(int&nbsp;rows,
           int&nbsp;columns)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a matrix with cells having descending values.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#diagonal(cern.colt.matrix.DoubleMatrix1D)">diagonal</A></B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix1D.html" title="class in cern.colt.matrix">DoubleMatrix1D</A>&nbsp;vector)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a new diagonal matrix whose diagonal elements are the elements of <tt>vector</tt>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix1D.html" title="class in cern.colt.matrix">DoubleMatrix1D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#diagonal(cern.colt.matrix.DoubleMatrix2D)">diagonal</A></B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;A)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a new vector consisting of the diagonal elements of <tt>A</tt>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#identity(int)">identity</A></B>(int&nbsp;rowsAndColumns)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs an identity matrix (having ones on the diagonal and zeros elsewhere).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#make(double[][])">make</A></B>(double[][]&nbsp;values)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a matrix with the given cell values.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#make(double[], int)">make</A></B>(double[]&nbsp;values,
     int&nbsp;rows)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Construct a matrix from a one-dimensional column-major packed array, ala Fortran.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#make(int, int)">make</A></B>(int&nbsp;rows,
     int&nbsp;columns)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a matrix with the given shape, each cell initialized with zero.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#make(int, int, double)">make</A></B>(int&nbsp;rows,
     int&nbsp;columns,
     double&nbsp;initialValue)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a matrix with the given shape, each cell initialized with the given value.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#random(int, int)">random</A></B>(int&nbsp;rows,
       int&nbsp;columns)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a matrix with uniformly distributed values in <tt>(0,1)</tt> (exclusive).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#repeat(cern.colt.matrix.DoubleMatrix2D, int, int)">repeat</A></B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;A,
       int&nbsp;rowRepeat,
       int&nbsp;columnRepeat)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;C = A||A||..||A; Constructs a new matrix which is duplicated both along the row and column dimension.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#sample(cern.colt.matrix.DoubleMatrix2D, double, double)">sample</A></B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;matrix,
       double&nbsp;value,
       double&nbsp;nonZeroFraction)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Modifies the given matrix to be a randomly sampled matrix.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#sample(int, int, double, double)">sample</A></B>(int&nbsp;rows,
       int&nbsp;columns,
       double&nbsp;value,
       double&nbsp;nonZeroFraction)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a randomly sampled matrix with the given shape.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_cern.colt.PersistentObject"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TD><B>Methods inherited from class cern.colt.<A HREF="../../../cern/colt/PersistentObject.html" title="class in cern.colt">PersistentObject</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../cern/colt/PersistentObject.html#clone()">clone</A></CODE></TD>
</TR>
</TABLE>
&nbsp;<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">
<TD><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
</TR>
</TABLE>
&nbsp;
<P>

<!-- ============ FIELD DETAIL =========== -->

<A NAME="field_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Field Detail</B></FONT></TD>
</TR>
</TABLE>

<A NAME="dense"><!-- --></A><H3>
dense</H3>
<PRE>
public static final <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html" title="class in cern.colt.matrix">DoubleFactory2D</A> <B>dense</B></PRE>
<DL>
<DD>A factory producing dense matrices.
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="sparse"><!-- --></A><H3>
sparse</H3>
<PRE>
public static final <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html" title="class in cern.colt.matrix">DoubleFactory2D</A> <B>sparse</B></PRE>
<DL>
<DD>A factory producing sparse hash matrices.
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="rowCompressed"><!-- --></A><H3>
rowCompressed</H3>
<PRE>
public static final <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html" title="class in cern.colt.matrix">DoubleFactory2D</A> <B>rowCompressed</B></PRE>
<DL>
<DD>A factory producing sparse row compressed matrices.
<P>
<DL>
</DL>
</DL>

<!-- ========= CONSTRUCTOR DETAIL ======== -->


<!-- ============ METHOD DETAIL ========== -->

<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Method Detail</B></FONT></TD>
</TR>
</TABLE>

<A NAME="appendColumns(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D)"><!-- --></A><H3>
appendColumns</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>appendColumns</B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;A,
                                    <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;B)</PRE>
<DL>
<DD>C = A||B; Constructs a new matrix which is the column-wise concatenation of two other matrices.
<pre>
0 1 2
3 4 5
appendColumns
6 7
8 9
-->
0 1 2 6 7 
3 4 5 8 9
</pre>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="appendRows(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D)"><!-- --></A><H3>
appendRows</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>appendRows</B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;A,
                                 <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;B)</PRE>
<DL>
<DD>C = A||B; Constructs a new matrix which is the row-wise concatenation of two other matrices.
<pre>
0 1 
2 3 
4 5
appendRows
6 7
8 9
-->
0 1 
2 3 
4 5
6 7
8 9
</pre>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="ascending(int, int)"><!-- --></A><H3>
ascending</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>ascending</B>(int&nbsp;rows,
                                int&nbsp;columns)</PRE>
<DL>
<DD>Constructs a matrix with cells having ascending values.
For debugging purposes.
Example:
<pre>
0 1 2 
3 4 5
</pre>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="compose(cern.colt.matrix.DoubleMatrix2D[][])"><!-- --></A><H3>
compose</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>compose</B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>[][]&nbsp;parts)</PRE>
<DL>
<DD>Constructs a block matrix made from the given parts.
The inverse to method <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#decompose(cern.colt.matrix.DoubleMatrix2D[][], cern.colt.matrix.DoubleMatrix2D)"><CODE>decompose(DoubleMatrix2D[][], DoubleMatrix2D)</CODE></A>.
<p>
All matrices of a given column within <tt>parts</tt> must have the same number of columns.
All matrices of a given row within <tt>parts</tt> must have the same number of rows.
Otherwise an <tt>IllegalArgumentException</tt> is thrown. 
Note that <tt>null</tt>s within <tt>parts[row,col]</tt> are an exception to this rule: they are ignored.
Cells are copied.
Example:
<table border="1" cellspacing="0">
  <tr align="left" valign="top"> 
        <td><tt>Code</tt></td>
        <td><tt>Result</tt></td>
  </tr>
  <tr align="left" valign="top"> 
        <td> 
          <pre>
DoubleMatrix2D[][] parts1 = 
{
&nbsp;&nbsp;&nbsp;{ null,        make(2,2,1), null        },
&nbsp;&nbsp;&nbsp;{ make(4,4,2), null,        make(4,3,3) },
&nbsp;&nbsp;&nbsp;{ null,        make(2,2,4), null        }
};
System.out.println(compose(parts1));
</pre>
        </td>
        <td><tt>8&nbsp;x&nbsp;9&nbsp;matrix<br>
          0&nbsp;0&nbsp;0&nbsp;0&nbsp;1&nbsp;1&nbsp;0&nbsp;0&nbsp;0<br>
          0&nbsp;0&nbsp;0&nbsp;0&nbsp;1&nbsp;1&nbsp;0&nbsp;0&nbsp;0<br>
          2&nbsp;2&nbsp;2&nbsp;2&nbsp;0&nbsp;0&nbsp;3&nbsp;3&nbsp;3<br>
          2&nbsp;2&nbsp;2&nbsp;2&nbsp;0&nbsp;0&nbsp;3&nbsp;3&nbsp;3<br>
          2&nbsp;2&nbsp;2&nbsp;2&nbsp;0&nbsp;0&nbsp;3&nbsp;3&nbsp;3<br>
          2&nbsp;2&nbsp;2&nbsp;2&nbsp;0&nbsp;0&nbsp;3&nbsp;3&nbsp;3<br>
          0&nbsp;0&nbsp;0&nbsp;0&nbsp;4&nbsp;4&nbsp;0&nbsp;0&nbsp;0<br>
          0&nbsp;0&nbsp;0&nbsp;0&nbsp;4&nbsp;4&nbsp;0&nbsp;0&nbsp;0</tt></td>
  </tr>
  <tr align="left" valign="top"> 
        <td> 
          <pre>
DoubleMatrix2D[][] parts3 = 
{
&nbsp;&nbsp;&nbsp;{ identity(3),               null,                        },
&nbsp;&nbsp;&nbsp;{ null,                      identity(3).viewColumnFlip() },
&nbsp;&nbsp;&nbsp;{ identity(3).viewRowFlip(), null                         }
};
System.out.println("\n"+make(parts3));
</pre>
        </td>
        <td><tt>9&nbsp;x&nbsp;6&nbsp;matrix<br>
          1&nbsp;0&nbsp;0&nbsp;0&nbsp;0&nbsp;0<br>
          0&nbsp;1&nbsp;0&nbsp;0&nbsp;0&nbsp;0<br>
          0&nbsp;0&nbsp;1&nbsp;0&nbsp;0&nbsp;0<br>
          0&nbsp;0&nbsp;0&nbsp;0&nbsp;0&nbsp;1<br>
          0&nbsp;0&nbsp;0&nbsp;0&nbsp;1&nbsp;0<br>
          0&nbsp;0&nbsp;0&nbsp;1&nbsp;0&nbsp;0<br>
          0&nbsp;0&nbsp;1&nbsp;0&nbsp;0&nbsp;0<br>
          0&nbsp;1&nbsp;0&nbsp;0&nbsp;0&nbsp;0<br>
          1&nbsp;0&nbsp;0&nbsp;0&nbsp;0&nbsp;0 </tt></td>
  </tr>
  <tr align="left" valign="top"> 
        <td> 
          <pre>
DoubleMatrix2D A = ascending(2,2);
DoubleMatrix2D B = descending(2,2);
DoubleMatrix2D _ = null;

DoubleMatrix2D[][] parts4 = 
{
&nbsp;&nbsp;&nbsp;{ A, _, A, _ },
&nbsp;&nbsp;&nbsp;{ _, A, _, B }
};
System.out.println("\n"+make(parts4));
</pre>
        </td>
        <td><tt>4&nbsp;x&nbsp;8&nbsp;matrix<br>
          1&nbsp;2&nbsp;0&nbsp;0&nbsp;1&nbsp;2&nbsp;0&nbsp;0<br>
          3&nbsp;4&nbsp;0&nbsp;0&nbsp;3&nbsp;4&nbsp;0&nbsp;0<br>
          0&nbsp;0&nbsp;1&nbsp;2&nbsp;0&nbsp;0&nbsp;3&nbsp;2<br>
          0&nbsp;0&nbsp;3&nbsp;4&nbsp;0&nbsp;0&nbsp;1&nbsp;0 </tt></td>
  </tr>
  <tr align="left" valign="top"> 
        <td> 
          <pre>
DoubleMatrix2D[][] parts2 = 
{
&nbsp;&nbsp;&nbsp;{ null,        make(2,2,1), null        },
&nbsp;&nbsp;&nbsp;{ make(4,4,2), null,        make(4,3,3) },
&nbsp;&nbsp;&nbsp;{ null,        make(2,3,4), null        }
};
System.out.println("\n"+Factory2D.make(parts2));
</pre>
        </td>
        <td><tt>IllegalArgumentException<br>
          A[0,1].cols != A[2,1].cols<br>
          (2 != 3)</tt></td>
  </tr>
</table>
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - subject to the conditions outlined above.</DL>
</DD>
</DL>
<HR>

<A NAME="composeDiagonal(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D)"><!-- --></A><H3>
composeDiagonal</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>composeDiagonal</B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;A,
                                      <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;B)</PRE>
<DL>
<DD>Constructs a diagonal block matrix from the given parts (the <i>direct sum</i> of two matrices).
That is the concatenation
<pre>
A 0
0 B
</pre>
(The direct sum has <tt>A.rows()+B.rows()</tt> rows and <tt>A.columns()+B.columns()</tt> columns).
Cells are copied.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>a new matrix which is the direct sum.</DL>
</DD>
</DL>
<HR>

<A NAME="composeDiagonal(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D)"><!-- --></A><H3>
composeDiagonal</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>composeDiagonal</B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;A,
                                      <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;B,
                                      <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;C)</PRE>
<DL>
<DD>Constructs a diagonal block matrix from the given parts.
The concatenation has the form
<pre>
A 0 0
0 B 0
0 0 C
</pre>
from the given parts.
Cells are copied.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="decompose(cern.colt.matrix.DoubleMatrix2D[][], cern.colt.matrix.DoubleMatrix2D)"><!-- --></A><H3>
decompose</H3>
<PRE>
public void <B>decompose</B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>[][]&nbsp;parts,
                      <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;matrix)</PRE>
<DL>
<DD>Splits a block matrix into its constituent blocks; Copies blocks of a matrix into the given parts.
The inverse to method <A HREF="../../../cern/colt/matrix/DoubleFactory2D.html#compose(cern.colt.matrix.DoubleMatrix2D[][])"><CODE>compose(DoubleMatrix2D[][])</CODE></A>.
<p>
All matrices of a given column within <tt>parts</tt> must have the same number of columns.
All matrices of a given row within <tt>parts</tt> must have the same number of rows.
Otherwise an <tt>IllegalArgumentException</tt> is thrown. 
Note that <tt>null</tt>s within <tt>parts[row,col]</tt> are an exception to this rule: they are ignored.
Cells are copied.
Example:
<table border="1" cellspacing="0">
  <tr align="left" valign="top"> 
        <td><tt>Code</tt></td>
        <td><tt>matrix</tt></td>
        <td><tt>--&gt; parts </tt></td>
  </tr>
  <tr align="left" valign="top"> 
        <td> 
          <pre>
DoubleMatrix2D matrix = ... ;
DoubleMatrix2D _ = null;
DoubleMatrix2D A,B,C,D;
A = make(2,2); B = make (4,4);
C = make(4,3); D = make (2,2);
DoubleMatrix2D[][] parts = 
{
&nbsp;&nbsp;&nbsp;{ _, A, _ },
&nbsp;&nbsp;&nbsp;{ B, _, C },
&nbsp;&nbsp;&nbsp;{ _, D, _ }
};
decompose(parts,matrix);
System.out.println(&quot;\nA = &quot;+A);
System.out.println(&quot;\nB = &quot;+B);
System.out.println(&quot;\nC = &quot;+C);
System.out.println(&quot;\nD = &quot;+D);
</pre>
        </td>
        <td><tt>8&nbsp;x&nbsp;9&nbsp;matrix<br>
          9&nbsp;9&nbsp;9&nbsp;9&nbsp;1&nbsp;1&nbsp;9&nbsp;9&nbsp;9<br>
          9&nbsp;9&nbsp;9&nbsp;9&nbsp;1&nbsp;1&nbsp;9&nbsp;9&nbsp;9<br>
          2&nbsp;2&nbsp;2&nbsp;2&nbsp;9&nbsp;9&nbsp;3&nbsp;3&nbsp;3<br>
          2&nbsp;2&nbsp;2&nbsp;2&nbsp;9&nbsp;9&nbsp;3&nbsp;3&nbsp;3<br>
          2&nbsp;2&nbsp;2&nbsp;2&nbsp;9&nbsp;9&nbsp;3&nbsp;3&nbsp;3<br>
          2&nbsp;2&nbsp;2&nbsp;2&nbsp;9&nbsp;9&nbsp;3&nbsp;3&nbsp;3<br>
          9&nbsp;9&nbsp;9&nbsp;9&nbsp;4&nbsp;4&nbsp;9&nbsp;9&nbsp;9<br>
          9&nbsp;9&nbsp;9&nbsp;9&nbsp;4&nbsp;4&nbsp;9&nbsp;9&nbsp;9</tt></td>
        <td> 
          <p><tt>A = 2&nbsp;x&nbsp;2&nbsp;matrix<br>
                1&nbsp;1<br>
                1&nbsp;1</tt></p>
          <p><tt>B = 4&nbsp;x&nbsp;4&nbsp;matrix<br>
                2&nbsp;2&nbsp;2&nbsp;2<br>
                2&nbsp;2&nbsp;2&nbsp;2<br>
                2&nbsp;2&nbsp;2&nbsp;2<br>
                2&nbsp;2&nbsp;2&nbsp;2</tt></p>
          <p><tt>C = 4&nbsp;x&nbsp;3&nbsp;matrix<br>
                3&nbsp;3&nbsp;3<br>
                3&nbsp;3&nbsp;3<br>
                </tt><tt>3&nbsp;3&nbsp;3<br>
                </tt><tt>3&nbsp;3&nbsp;3</tt></p>
          <p><tt>D = 2&nbsp;x&nbsp;2&nbsp;matrix<br>
                4&nbsp;4<br>
                4&nbsp;4</tt></p>
          </td>
  </tr>
</table>
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - subject to the conditions outlined above.</DL>
</DD>
</DL>
<HR>

<A NAME="demo1()"><!-- --></A><H3>
demo1</H3>
<PRE>
public void <B>demo1</B>()</PRE>
<DL>
<DD>Demonstrates usage of this class.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="demo2()"><!-- --></A><H3>
demo2</H3>
<PRE>
public void <B>demo2</B>()</PRE>
<DL>
<DD>Demonstrates usage of this class.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="descending(int, int)"><!-- --></A><H3>
descending</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>descending</B>(int&nbsp;rows,
                                 int&nbsp;columns)</PRE>
<DL>
<DD>Constructs a matrix with cells having descending values.
For debugging purposes.
Example:
<pre>
5 4 3 
2 1 0
</pre>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="diagonal(cern.colt.matrix.DoubleMatrix1D)"><!-- --></A><H3>
diagonal</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>diagonal</B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix1D.html" title="class in cern.colt.matrix">DoubleMatrix1D</A>&nbsp;vector)</PRE>
<DL>
<DD>Constructs a new diagonal matrix whose diagonal elements are the elements of <tt>vector</tt>.
Cells values are copied. The new matrix is not a view.
Example:
<pre>
5 4 3 -->
5 0 0
0 4 0
0 0 3
</pre>
<P>
<DD><DL>

<DT><B>Returns:</B><DD>a new matrix.</DL>
</DD>
</DL>
<HR>

<A NAME="diagonal(cern.colt.matrix.DoubleMatrix2D)"><!-- --></A><H3>
diagonal</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix1D.html" title="class in cern.colt.matrix">DoubleMatrix1D</A> <B>diagonal</B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;A)</PRE>
<DL>
<DD>Constructs a new vector consisting of the diagonal elements of <tt>A</tt>.
Cells values are copied. The new vector is not a view.
Example:
<pre>
5 0 0 9
0 4 0 9
0 0 3 9
--> 5 4 3
</pre>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>A</CODE> - the matrix, need not be square.
<DT><B>Returns:</B><DD>a new vector.</DL>
</DD>
</DL>
<HR>

<A NAME="identity(int)"><!-- --></A><H3>
identity</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>identity</B>(int&nbsp;rowsAndColumns)</PRE>
<DL>
<DD>Constructs an identity matrix (having ones on the diagonal and zeros elsewhere).
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="make(double[][])"><!-- --></A><H3>
make</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>make</B>(double[][]&nbsp;values)</PRE>
<DL>
<DD>Constructs a matrix with the given cell values.
 <tt>values</tt> is required to have the form <tt>values[row][column]</tt>
 and have exactly the same number of columns in every row.
 <p>
 The values are copied. So subsequent changes in <tt>values</tt> are not reflected in the matrix, and vice-versa.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>values</CODE> - The values to be filled into the new matrix.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if <tt>for any 1 &lt;= row &lt; values.length: values[row].length != values[row-1].length</tt>.</DL>
</DD>
</DL>
<HR>

<A NAME="make(double[], int)"><!-- --></A><H3>
make</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>make</B>(double[]&nbsp;values,
                           int&nbsp;rows)</PRE>
<DL>
<DD>Construct a matrix from a one-dimensional column-major packed array, ala Fortran.
Has the form <tt>matrix.get(row,column) == values[row + column*rows]</tt>.
The values are copied.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>values</CODE> - One-dimensional array of doubles, packed by columns (ala Fortran).<DD><CODE>rows</CODE> - the number of rows.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - <tt>values.length</tt> must be a multiple of <tt>rows</tt>.</DL>
</DD>
</DL>
<HR>

<A NAME="make(int, int)"><!-- --></A><H3>
make</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>make</B>(int&nbsp;rows,
                           int&nbsp;columns)</PRE>
<DL>
<DD>Constructs a matrix with the given shape, each cell initialized with zero.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="make(int, int, double)"><!-- --></A><H3>
make</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>make</B>(int&nbsp;rows,
                           int&nbsp;columns,
                           double&nbsp;initialValue)</PRE>
<DL>
<DD>Constructs a matrix with the given shape, each cell initialized with the given value.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="random(int, int)"><!-- --></A><H3>
random</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>random</B>(int&nbsp;rows,
                             int&nbsp;columns)</PRE>
<DL>
<DD>Constructs a matrix with uniformly distributed values in <tt>(0,1)</tt> (exclusive).
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="repeat(cern.colt.matrix.DoubleMatrix2D, int, int)"><!-- --></A><H3>
repeat</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>repeat</B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;A,
                             int&nbsp;rowRepeat,
                             int&nbsp;columnRepeat)</PRE>
<DL>
<DD>C = A||A||..||A; Constructs a new matrix which is duplicated both along the row and column dimension.
Example:
<pre>
0 1
2 3
repeat(2,3) -->
0 1 0 1 0 1
2 3 2 3 2 3
0 1 0 1 0 1
2 3 2 3 2 3
</pre>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="sample(int, int, double, double)"><!-- --></A><H3>
sample</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>sample</B>(int&nbsp;rows,
                             int&nbsp;columns,
                             double&nbsp;value,
                             double&nbsp;nonZeroFraction)</PRE>
<DL>
<DD>Constructs a randomly sampled matrix with the given shape.
 Randomly picks exactly <tt>Math.round(rows*columns*nonZeroFraction)</tt> cells and initializes them to <tt>value</tt>, all the rest will be initialized to zero.
 Note that this is not the same as setting each cell with probability <tt>nonZeroFraction</tt> to <tt>value</tt>.
 Note: The random seed is a constant.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if <tt>nonZeroFraction < 0 || nonZeroFraction > 1</tt>.<DT><B>See Also:</B><DD><A HREF="../../../cern/jet/random/sampling/RandomSampler.html" title="class in cern.jet.random.sampling"><CODE>RandomSampler</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="sample(cern.colt.matrix.DoubleMatrix2D, double, double)"><!-- --></A><H3>
sample</H3>
<PRE>
public <A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>sample</B>(<A HREF="../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A>&nbsp;matrix,
                             double&nbsp;value,
                             double&nbsp;nonZeroFraction)</PRE>
<DL>
<DD>Modifies the given matrix to be a randomly sampled matrix.
 Randomly picks exactly <tt>Math.round(rows*columns*nonZeroFraction)</tt> cells and initializes them to <tt>value</tt>, all the rest will be initialized to zero.
 Note that this is not the same as setting each cell with probability <tt>nonZeroFraction</tt> to <tt>value</tt>.
 Note: The random seed is a constant.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if <tt>nonZeroFraction < 0 || nonZeroFraction > 1</tt>.<DT><B>See Also:</B><DD><A HREF="../../../cern/jet/random/sampling/RandomSampler.html" title="class in cern.jet.random.sampling"><CODE>RandomSampler</CODE></A></DL>
</DD>
</DL>
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