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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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DenseObjectMatrix2D (Colt 1.2.0 - API Specification)
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cern.colt.matrix.impl</FONT>
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Class DenseObjectMatrix2D</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"><A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix.html" title="class in cern.colt.matrix.impl">cern.colt.matrix.impl.AbstractMatrix</A>
          <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix2D.html" title="class in cern.colt.matrix.impl">cern.colt.matrix.impl.AbstractMatrix2D</A>
              <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">cern.colt.matrix.ObjectMatrix2D</A>
                  <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><B>cern.colt.matrix.impl.DenseObjectMatrix2D</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>DenseObjectMatrix2D</B><DT>extends <A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></DL>

<P>
Dense 2-d matrix holding <tt>Object</tt> elements.
First see the <a href="package-summary.html">package summary</a> and javadoc <a href="package-tree.html">tree view</a> to get the broad picture.
<p>
<b>Implementation:</b>
<p>
Internally holds one single contigous one-dimensional array, addressed in row major. 
Note that this implementation is not synchronized.
<p>
<b>Memory requirements:</b>
<p>
<tt>memory [bytes] = 8*rows()*columns()</tt>.
Thus, a 1000*1000 matrix uses 8 MB.
<p>
<b>Time complexity:</b>
<p>
<tt>O(1)</tt> (i.e. constant time) for the basic operations
<tt>get</tt>, <tt>getQuick</tt>, <tt>set</tt>, <tt>setQuick</tt> and <tt>size</tt>,
<p>
Cells are internally addressed in row-major.
Applications demanding utmost speed can exploit this fact.
Setting/getting values in a loop row-by-row is quicker than column-by-column.
Thus
<pre>
   for (int row=0; row < rows; row++) {
          for (int column=0; column < columns; column++) {
                 matrix.setQuick(row,column,someValue);
          }
   }
</pre>
is quicker than
<pre>
   for (int column=0; column < columns; column++) {
          for (int row=0; row < rows; row++) {
                 matrix.setQuick(row,column,someValue);
          }
   }
</pre>
<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.impl.DenseObjectMatrix2D">Serialized Form</A></DL>
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&nbsp;
<!-- ======== CONSTRUCTOR SUMMARY ======== -->

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<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/DenseObjectMatrix2D.html#DenseObjectMatrix2D(int, int)">DenseObjectMatrix2D</A></B>(int&nbsp;rows,
                    int&nbsp;columns)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a matrix with a given number of rows and columns.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/DenseObjectMatrix2D.html#DenseObjectMatrix2D(java.lang.Object[][])">DenseObjectMatrix2D</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[][]&nbsp;values)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a matrix with a copy of the given values.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/DenseObjectMatrix2D.html#assign(java.lang.Object[][])">assign</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[][]&nbsp;values)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets all cells to the state specified by <tt>values</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/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/DenseObjectMatrix2D.html#assign(cern.colt.function.ObjectFunction)">assign</A></B>(<A HREF="../../../../cern/colt/function/ObjectFunction.html" title="interface in cern.colt.function">ObjectFunction</A>&nbsp;function)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Assigns the result of a function to each cell; <tt>x[row,col] = function(x[row,col])</tt>.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/DenseObjectMatrix2D.html#assign(cern.colt.matrix.ObjectMatrix2D)">assign</A></B>(<A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A>&nbsp;source)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Replaces all cell values of the receiver with the values of another 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/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/DenseObjectMatrix2D.html#assign(cern.colt.matrix.ObjectMatrix2D, cern.colt.function.ObjectObjectFunction)">assign</A></B>(<A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A>&nbsp;y,
       <A HREF="../../../../cern/colt/function/ObjectObjectFunction.html" title="interface in cern.colt.function">ObjectObjectFunction</A>&nbsp;function)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Assigns the result of a function to each cell; <tt>x[row,col] = function(x[row,col],y[row,col])</tt>.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/DenseObjectMatrix2D.html#getQuick(int, int)">getQuick</A></B>(int&nbsp;row,
         int&nbsp;column)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the matrix cell value at coordinate <tt>[row,column]</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/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/DenseObjectMatrix2D.html#like(int, int)">like</A></B>(int&nbsp;rows,
     int&nbsp;columns)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Construct and returns a new empty matrix <i>of the same dynamic type</i> as the receiver, having the specified number of rows and columns.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../cern/colt/matrix/ObjectMatrix1D.html" title="class in cern.colt.matrix">ObjectMatrix1D</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/DenseObjectMatrix2D.html#like1D(int)">like1D</A></B>(int&nbsp;size)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Construct and returns a new 1-d matrix <i>of the corresponding dynamic type</i>, entirelly independent of the receiver.</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/impl/DenseObjectMatrix2D.html#setQuick(int, int, java.lang.Object)">setQuick</A></B>(int&nbsp;row,
         int&nbsp;column,
         <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;value)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the matrix cell at coordinate <tt>[row,column]</tt> to the specified value.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_cern.colt.matrix.ObjectMatrix2D"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TD><B>Methods inherited from class cern.colt.matrix.<A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></B></TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix.html#ensureCapacity(int)">ensureCapacity</A>, <A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix.html#trimToSize()">trimToSize</A></CODE></TD>
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<!-- ============ FIELD DETAIL =========== -->


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

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<A NAME="DenseObjectMatrix2D(java.lang.Object[][])"><!-- --></A><H3>
DenseObjectMatrix2D</H3>
<PRE>
public <B>DenseObjectMatrix2D</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[][]&nbsp;values)</PRE>
<DL>
<DD>Constructs a matrix with a copy of the given 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>
<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>
<HR>

<A NAME="DenseObjectMatrix2D(int, int)"><!-- --></A><H3>
DenseObjectMatrix2D</H3>
<PRE>
public <B>DenseObjectMatrix2D</B>(int&nbsp;rows,
                           int&nbsp;columns)</PRE>
<DL>
<DD>Constructs a matrix with a given number of rows and columns.
 All entries are initially <tt>0</tt>.
<P>
<DT><B>Parameters:</B><DD><CODE>rows</CODE> - the number of rows the matrix shall have.<DD><CODE>columns</CODE> - the number of columns the matrix shall have.
<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>rows<0 || columns<0 || (Object)columns*rows > Integer.MAX_VALUE</tt>.</DL>

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<A NAME="assign(java.lang.Object[][])"><!-- --></A><H3>
assign</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A> <B>assign</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[][]&nbsp;values)</PRE>
<DL>
<DD>Sets all cells to the state specified by <tt>values</tt>.
 <tt>values</tt> is required to have the form <tt>values[row][column]</tt>
 and have exactly the same number of rows and columns as the receiver.
 <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>Overrides:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html#assign(java.lang.Object[][])">assign</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>values</CODE> - the values to be filled into the cells.
<DT><B>Returns:</B><DD><tt>this</tt> (for convenience only).
<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>values.length != rows() || for any 0 &lt;= row &lt; rows(): values[row].length != columns()</tt>.</DL>
</DD>
</DL>
<HR>

<A NAME="assign(cern.colt.function.ObjectFunction)"><!-- --></A><H3>
assign</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A> <B>assign</B>(<A HREF="../../../../cern/colt/function/ObjectFunction.html" title="interface in cern.colt.function">ObjectFunction</A>&nbsp;function)</PRE>
<DL>
<DD>Assigns the result of a function to each cell; <tt>x[row,col] = function(x[row,col])</tt>.
<p>
<b>Example:</b>
<pre>
matrix = 2 x 2 matrix
0.5 1.5      
2.5 3.5

// change each cell to its sine
matrix.assign(cern.jet.math.Functions.sin);
-->
2 x 2 matrix
0.479426  0.997495 
0.598472 -0.350783
</pre>
For further examples, see the <a href="package-summary.html#FunctionObjects">package doc</a>.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html#assign(cern.colt.function.ObjectFunction)">assign</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>function</CODE> - a function object taking as argument the current cell's value.
<DT><B>Returns:</B><DD><tt>this</tt> (for convenience only).<DT><B>See Also:</B><DD><A HREF="../../../../cern/jet/math/Functions.html" title="class in cern.jet.math"><CODE>Functions</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="assign(cern.colt.matrix.ObjectMatrix2D)"><!-- --></A><H3>
assign</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A> <B>assign</B>(<A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A>&nbsp;source)</PRE>
<DL>
<DD>Replaces all cell values of the receiver with the values of another matrix.
 Both matrices must have the same number of rows and columns.
 If both matrices share the same cells (as is the case if they are views derived from the same matrix) and intersect in an ambiguous way, then replaces <i>as if</i> using an intermediate auxiliary deep copy of <tt>other</tt>.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html#assign(cern.colt.matrix.ObjectMatrix2D)">assign</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - the source matrix to copy from (may be identical to the receiver).
<DT><B>Returns:</B><DD><tt>this</tt> (for convenience only).
<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>columns() != source.columns() || rows() != source.rows()</tt></DL>
</DD>
</DL>
<HR>

<A NAME="assign(cern.colt.matrix.ObjectMatrix2D, cern.colt.function.ObjectObjectFunction)"><!-- --></A><H3>
assign</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A> <B>assign</B>(<A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A>&nbsp;y,
                             <A HREF="../../../../cern/colt/function/ObjectObjectFunction.html" title="interface in cern.colt.function">ObjectObjectFunction</A>&nbsp;function)</PRE>
<DL>
<DD>Assigns the result of a function to each cell; <tt>x[row,col] = function(x[row,col],y[row,col])</tt>.
<p>
<b>Example:</b>
<pre>
// assign x[row,col] = x[row,col]<sup>y[row,col]</sup>
m1 = 2 x 2 matrix 
0 1 
2 3

m2 = 2 x 2 matrix 
0 2 
4 6

m1.assign(m2, cern.jet.math.Functions.pow);
-->
m1 == 2 x 2 matrix
 1   1 
16 729
</pre>
For further examples, see the <a href="package-summary.html#FunctionObjects">package doc</a>.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html#assign(cern.colt.matrix.ObjectMatrix2D, cern.colt.function.ObjectObjectFunction)">assign</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>y</CODE> - the secondary matrix to operate on.<DD><CODE>function</CODE> - a function object taking as first argument the current cell's value of <tt>this</tt>,
and as second argument the current cell's value of <tt>y</tt>,
<DT><B>Returns:</B><DD><tt>this</tt> (for convenience only).
<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>columns() != other.columns() || rows() != other.rows()</tt><DT><B>See Also:</B><DD><A HREF="../../../../cern/jet/math/Functions.html" title="class in cern.jet.math"><CODE>Functions</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getQuick(int, int)"><!-- --></A><H3>
getQuick</H3>
<PRE>
public <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>getQuick</B>(int&nbsp;row,
                       int&nbsp;column)</PRE>
<DL>
<DD>Returns the matrix cell value at coordinate <tt>[row,column]</tt>.

 <p>Provided with invalid parameters this method may return invalid objects without throwing any exception.
 <b>You should only use this method when you are absolutely sure that the coordinate is within bounds.</b>
 Precondition (unchecked): <tt>0 &lt;= column &lt; columns() && 0 &lt;= row &lt; rows()</tt>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html#getQuick(int, int)">getQuick</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>row</CODE> - the index of the row-coordinate.<DD><CODE>column</CODE> - the index of the column-coordinate.
<DT><B>Returns:</B><DD>the value at the specified coordinate.</DL>
</DD>
</DL>
<HR>

<A NAME="like(int, int)"><!-- --></A><H3>
like</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A> <B>like</B>(int&nbsp;rows,
                           int&nbsp;columns)</PRE>
<DL>
<DD>Construct and returns a new empty matrix <i>of the same dynamic type</i> as the receiver, having the specified number of rows and columns.
 For example, if the receiver is an instance of type <tt>DenseObjectMatrix2D</tt> the new matrix must also be of type <tt>DenseObjectMatrix2D</tt>,
 if the receiver is an instance of type <tt>SparseObjectMatrix2D</tt> the new matrix must also be of type <tt>SparseObjectMatrix2D</tt>, etc.
 In general, the new matrix should have internal parametrization as similar as possible.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html#like(int, int)">like</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rows</CODE> - the number of rows the matrix shall have.<DD><CODE>columns</CODE> - the number of columns the matrix shall have.
<DT><B>Returns:</B><DD>a new empty matrix of the same dynamic type.</DL>
</DD>
</DL>
<HR>

<A NAME="like1D(int)"><!-- --></A><H3>
like1D</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/ObjectMatrix1D.html" title="class in cern.colt.matrix">ObjectMatrix1D</A> <B>like1D</B>(int&nbsp;size)</PRE>
<DL>
<DD>Construct and returns a new 1-d matrix <i>of the corresponding dynamic type</i>, entirelly independent of the receiver.
 For example, if the receiver is an instance of type <tt>DenseObjectMatrix2D</tt> the new matrix must be of type <tt>DenseObjectMatrix1D</tt>,
 if the receiver is an instance of type <tt>SparseObjectMatrix2D</tt> the new matrix must be of type <tt>SparseObjectMatrix1D</tt>, etc.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html#like1D(int)">like1D</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>size</CODE> - the number of cells the matrix shall have.
<DT><B>Returns:</B><DD>a new matrix of the corresponding dynamic type.</DL>
</DD>
</DL>
<HR>

<A NAME="setQuick(int, int, java.lang.Object)"><!-- --></A><H3>
setQuick</H3>
<PRE>
public void <B>setQuick</B>(int&nbsp;row,
                     int&nbsp;column,
                     <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;value)</PRE>
<DL>
<DD>Sets the matrix cell at coordinate <tt>[row,column]</tt> to the specified value.

 <p>Provided with invalid parameters this method may access illegal indexes without throwing any exception.
 <b>You should only use this method when you are absolutely sure that the coordinate is within bounds.</b>
 Precondition (unchecked): <tt>0 &lt;= column &lt; columns() && 0 &lt;= row &lt; rows()</tt>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html#setQuick(int, int, java.lang.Object)">setQuick</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/ObjectMatrix2D.html" title="class in cern.colt.matrix">ObjectMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>row</CODE> - the index of the row-coordinate.<DD><CODE>column</CODE> - the index of the column-coordinate.<DD><CODE>value</CODE> - the value to be filled into the specified cell.</DL>
</DD>
</DL>
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