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SparseDoubleMatrix2D (Colt 1.2.0 - API Specification)
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cern.colt.matrix.impl</FONT>
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Class SparseDoubleMatrix2D</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/DoubleMatrix2D.html" title="class in cern.colt.matrix">cern.colt.matrix.DoubleMatrix2D</A>
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><B>cern.colt.matrix.impl.SparseDoubleMatrix2D</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>SparseDoubleMatrix2D</B><DT>extends <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></DL>
<P>
Sparse hashed 2-d matrix holding <tt>double</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>
Note that this implementation is not synchronized.
Uses a <A HREF="../../../../cern/colt/map/OpenIntDoubleHashMap.html" title="class in cern.colt.map"><CODE>OpenIntDoubleHashMap</CODE></A>, which is a compact and performant hashing technique.
<p>
<b>Memory requirements:</b>
<p>
Cells that
<ul>
<li>are never set to non-zero values do not use any memory.
<li>switch from zero to non-zero state do use memory.
<li>switch back from non-zero to zero state also do use memory. However, their memory is automatically reclaimed from time to time. It can also manually be reclaimed by calling <A HREF="../../../../cern/colt/matrix/impl/SparseDoubleMatrix2D.html#trimToSize()"><CODE>trimToSize()</CODE></A>.
</ul>
<p>
worst case: <tt>memory [bytes] = (1/minLoadFactor) * nonZeros * 13</tt>.
<br>best case: <tt>memory [bytes] = (1/maxLoadFactor) * nonZeros * 13</tt>.
<br>Where <tt>nonZeros = cardinality()</tt> is the number of non-zero cells.
Thus, a 1000 x 1000 matrix with minLoadFactor=0.25 and maxLoadFactor=0.5 and 1000000 non-zero cells consumes between 25 MB and 50 MB.
The same 1000 x 1000 matrix with 1000 non-zero cells consumes between 25 and 50 KB.
<p>
<b>Time complexity:</b>
<p>
This class offers <i>expected</i> time complexity <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>
assuming the hash function disperses the elements properly among the buckets.
Otherwise, pathological cases, although highly improbable, can occur, degrading performance to <tt>O(N)</tt> in the worst case.
As such this sparse class is expected to have no worse time complexity than its dense counterpart <A HREF="../../../../cern/colt/matrix/impl/DenseDoubleMatrix2D.html" title="class in cern.colt.matrix.impl"><CODE>DenseDoubleMatrix2D</CODE></A>.
However, constant factors are considerably larger.
<p>
Cells are internally addressed in row-major.
Performance sensitive applications can exploit this fact.
Setting values in a loop row-by-row is quicker than column-by-column, because fewer hash collisions occur.
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="../../../../cern/colt/map/package-summary.html"><CODE>cern.colt.map</CODE></A>,
<A HREF="../../../../cern/colt/map/OpenIntDoubleHashMap.html" title="class in cern.colt.map"><CODE>OpenIntDoubleHashMap</CODE></A>,
<A HREF="../../../../serialized-form.html#cern.colt.matrix.impl.SparseDoubleMatrix2D">Serialized Form</A></DL>
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<B>Constructor Summary</B></FONT></TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/SparseDoubleMatrix2D.html#SparseDoubleMatrix2D(double[][])">SparseDoubleMatrix2D</A></B>(double[][] values)</CODE>
<BR>
Constructs a matrix with a copy of the given values.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/SparseDoubleMatrix2D.html#SparseDoubleMatrix2D(int, int)">SparseDoubleMatrix2D</A></B>(int rows,
int columns)</CODE>
<BR>
Constructs a matrix with a given number of rows and columns and default memory usage.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/SparseDoubleMatrix2D.html#SparseDoubleMatrix2D(int, int, int, double, double)">SparseDoubleMatrix2D</A></B>(int rows,
int columns,
int initialCapacity,
double minLoadFactor,
double maxLoadFactor)</CODE>
<BR>
Constructs a matrix with a given number of rows and columns using memory as specified.</TD>
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<!-- ========== METHOD SUMMARY =========== -->
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<B>Method Summary</B></FONT></TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <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/impl/SparseDoubleMatrix2D.html#assign(double)">assign</A></B>(double value)</CODE>
<BR>
Sets all cells to the state specified by <tt>value</tt>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <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/impl/SparseDoubleMatrix2D.html#assign(cern.colt.function.DoubleFunction)">assign</A></B>(<A HREF="../../../../cern/colt/function/DoubleFunction.html" title="interface in cern.colt.function">DoubleFunction</A> function)</CODE>
<BR>
Assigns the result of a function to each cell; <tt>x[row,col] = function(x[row,col])</tt>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <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/impl/SparseDoubleMatrix2D.html#assign(cern.colt.matrix.DoubleMatrix2D)">assign</A></B>(<A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> source)</CODE>
<BR>
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> <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/impl/SparseDoubleMatrix2D.html#assign(cern.colt.matrix.DoubleMatrix2D, cern.colt.function.DoubleDoubleFunction)">assign</A></B>(<A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> y,
<A HREF="../../../../cern/colt/function/DoubleDoubleFunction.html" title="interface in cern.colt.function">DoubleDoubleFunction</A> function)</CODE>
<BR>
Assigns the result of a function to each cell; <tt>x[row,col] = function(x[row,col],y[row,col])</tt>.</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="../../../../cern/colt/matrix/impl/SparseDoubleMatrix2D.html#cardinality()">cardinality</A></B>()</CODE>
<BR>
Returns the number of cells having non-zero values.</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="../../../../cern/colt/matrix/impl/SparseDoubleMatrix2D.html#ensureCapacity(int)">ensureCapacity</A></B>(int minCapacity)</CODE>
<BR>
Ensures that the receiver can hold at least the specified number of non-zero cells without needing to allocate new internal memory.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <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/impl/SparseDoubleMatrix2D.html#forEachNonZero(cern.colt.function.IntIntDoubleFunction)">forEachNonZero</A></B>(<A HREF="../../../../cern/colt/function/IntIntDoubleFunction.html" title="interface in cern.colt.function">IntIntDoubleFunction</A> function)</CODE>
<BR>
Assigns the result of a function to each <i>non-zero</i> cell; <tt>x[row,col] = function(x[row,col])</tt>.</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="../../../../cern/colt/matrix/impl/SparseDoubleMatrix2D.html#getQuick(int, int)">getQuick</A></B>(int row,
int column)</CODE>
<BR>
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> <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/impl/SparseDoubleMatrix2D.html#like(int, int)">like</A></B>(int rows,
int columns)</CODE>
<BR>
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> <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/impl/SparseDoubleMatrix2D.html#like1D(int)">like1D</A></B>(int size)</CODE>
<BR>
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> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../cern/colt/matrix/impl/SparseDoubleMatrix2D.html#setQuick(int, int, double)">setQuick</A></B>(int row,
int column,
double value)</CODE>
<BR>
Sets the matrix cell at coordinate <tt>[row,column]</tt> to the specified value.</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="../../../../cern/colt/matrix/impl/SparseDoubleMatrix2D.html#trimToSize()">trimToSize</A></B>()</CODE>
<BR>
Releases any superfluous memory created by explicitly putting zero values into cells formerly having non-zero values;
An application can use this operation to minimize the
storage of the receiver.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <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/impl/SparseDoubleMatrix2D.html#zMult(cern.colt.matrix.DoubleMatrix1D, cern.colt.matrix.DoubleMatrix1D, double, double, boolean)">zMult</A></B>(<A HREF="../../../../cern/colt/matrix/DoubleMatrix1D.html" title="class in cern.colt.matrix">DoubleMatrix1D</A> y,
<A HREF="../../../../cern/colt/matrix/DoubleMatrix1D.html" title="class in cern.colt.matrix">DoubleMatrix1D</A> z,
double alpha,
double beta,
boolean transposeA)</CODE>
<BR>
Linear algebraic matrix-vector multiplication; <tt>z = alpha * A * y + beta*z</tt>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <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/impl/SparseDoubleMatrix2D.html#zMult(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D, double, double, boolean, boolean)">zMult</A></B>(<A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> B,
<A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> C,
double alpha,
double beta,
boolean transposeA,
boolean transposeB)</CODE>
<BR>
Linear algebraic matrix-matrix multiplication; <tt>C = alpha * A x B + beta*C</tt>.</TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_cern.colt.matrix.DoubleMatrix2D"><!-- --></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/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#aggregate(cern.colt.function.DoubleDoubleFunction, cern.colt.function.DoubleFunction)">aggregate</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#aggregate(cern.colt.matrix.DoubleMatrix2D, cern.colt.function.DoubleDoubleFunction, cern.colt.function.DoubleDoubleFunction)">aggregate</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#assign(double[][])">assign</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#copy()">copy</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#equals(double)">equals</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#equals(java.lang.Object)">equals</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#get(int, int)">get</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#getNonZeros(cern.colt.list.IntArrayList, cern.colt.list.IntArrayList, cern.colt.list.DoubleArrayList)">getNonZeros</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#like()">like</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#set(int, int, double)">set</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#toArray()">toArray</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#toString()">toString</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#viewColumn(int)">viewColumn</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#viewColumnFlip()">viewColumnFlip</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#viewDice()">viewDice</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#viewPart(int, int, int, int)">viewPart</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#viewRow(int)">viewRow</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#viewRowFlip()">viewRowFlip</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#viewSelection(cern.colt.matrix.DoubleMatrix1DProcedure)">viewSelection</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#viewSelection(int[], int[])">viewSelection</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#viewSorted(int)">viewSorted</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#viewStrides(int, int)">viewStrides</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#zAssign8Neighbors(cern.colt.matrix.DoubleMatrix2D, cern.colt.function.Double9Function)">zAssign8Neighbors</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#zMult(cern.colt.matrix.DoubleMatrix1D, cern.colt.matrix.DoubleMatrix1D)">zMult</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#zMult(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D)">zMult</A>, <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#zSum()">zSum</A></CODE></TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_cern.colt.matrix.impl.AbstractMatrix2D"><!-- --></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.impl.<A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix2D.html" title="class in cern.colt.matrix.impl">AbstractMatrix2D</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix2D.html#checkShape(cern.colt.matrix.impl.AbstractMatrix2D)">checkShape</A>, <A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix2D.html#checkShape(cern.colt.matrix.impl.AbstractMatrix2D, cern.colt.matrix.impl.AbstractMatrix2D)">checkShape</A>, <A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix2D.html#columns()">columns</A>, <A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix2D.html#rows()">rows</A>, <A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix2D.html#size()">size</A>, <A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix2D.html#toStringShort()">toStringShort</A></CODE></TD>
</TR>
</TABLE>
<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>
<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#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#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>
<P>
<!-- ============ FIELD DETAIL =========== -->
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TD>
</TR>
</TABLE>
<A NAME="SparseDoubleMatrix2D(double[][])"><!-- --></A><H3>
SparseDoubleMatrix2D</H3>
<PRE>
public <B>SparseDoubleMatrix2D</B>(double[][] 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 <= row < values.length: values[row].length != values[row-1].length</tt>.</DL>
<HR>
<A NAME="SparseDoubleMatrix2D(int, int)"><!-- --></A><H3>
SparseDoubleMatrix2D</H3>
<PRE>
public <B>SparseDoubleMatrix2D</B>(int rows,
int columns)</PRE>
<DL>
<DD>Constructs a matrix with a given number of rows and columns and default memory usage.
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 || (double)columns*rows > Integer.MAX_VALUE</tt>.</DL>
<HR>
<A NAME="SparseDoubleMatrix2D(int, int, int, double, double)"><!-- --></A><H3>
SparseDoubleMatrix2D</H3>
<PRE>
public <B>SparseDoubleMatrix2D</B>(int rows,
int columns,
int initialCapacity,
double minLoadFactor,
double maxLoadFactor)</PRE>
<DL>
<DD>Constructs a matrix with a given number of rows and columns using memory as specified.
All entries are initially <tt>0</tt>.
For details related to memory usage see <A HREF="../../../../cern/colt/map/OpenIntDoubleHashMap.html" title="class in cern.colt.map"><CODE>OpenIntDoubleHashMap</CODE></A>.
<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.<DD><CODE>initialCapacity</CODE> - the initial capacity of the hash map.
If not known, set <tt>initialCapacity=0</tt> or small.<DD><CODE>minLoadFactor</CODE> - the minimum load factor of the hash map.<DD><CODE>maxLoadFactor</CODE> - the maximum load factor of the hash map.
<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>initialCapacity < 0 || (minLoadFactor < 0.0 || minLoadFactor >= 1.0) || (maxLoadFactor <= 0.0 || maxLoadFactor >= 1.0) || (minLoadFactor >= maxLoadFactor)</tt>.
<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 || (double)columns*rows > Integer.MAX_VALUE</tt>.</DL>
<!-- ============ 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="assign(double)"><!-- --></A><H3>
assign</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>assign</B>(double value)</PRE>
<DL>
<DD>Sets all cells to the state specified by <tt>value</tt>.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#assign(double)">assign</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - the value to be filled into the cells.
<DT><B>Returns:</B><DD><tt>this</tt> (for convenience only).</DL>
</DD>
</DL>
<HR>
<A NAME="assign(cern.colt.function.DoubleFunction)"><!-- --></A><H3>
assign</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>assign</B>(<A HREF="../../../../cern/colt/function/DoubleFunction.html" title="interface in cern.colt.function">DoubleFunction</A> 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/DoubleMatrix2D.html#assign(cern.colt.function.DoubleFunction)">assign</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</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.DoubleMatrix2D)"><!-- --></A><H3>
assign</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>assign</B>(<A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> 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/DoubleMatrix2D.html#assign(cern.colt.matrix.DoubleMatrix2D)">assign</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</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.DoubleMatrix2D, cern.colt.function.DoubleDoubleFunction)"><!-- --></A><H3>
assign</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>assign</B>(<A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> y,
<A HREF="../../../../cern/colt/function/DoubleDoubleFunction.html" title="interface in cern.colt.function">DoubleDoubleFunction</A> function)</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></B></DD>
<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="../../../../cern/colt/matrix/package-summary.html#FunctionObjects">package doc</a>.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#assign(cern.colt.matrix.DoubleMatrix2D, cern.colt.function.DoubleDoubleFunction)">assign</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</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>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="cardinality()"><!-- --></A><H3>
cardinality</H3>
<PRE>
public int <B>cardinality</B>()</PRE>
<DL>
<DD>Returns the number of cells having non-zero values.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#cardinality()">cardinality</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="ensureCapacity(int)"><!-- --></A><H3>
ensureCapacity</H3>
<PRE>
public void <B>ensureCapacity</B>(int minCapacity)</PRE>
<DL>
<DD>Ensures that the receiver can hold at least the specified number of non-zero cells without needing to allocate new internal memory.
If necessary, allocates new internal memory and increases the capacity of the receiver.
<p>
This method never need be called; it is for performance tuning only.
Calling this method before tt>set()</tt>ing a large number of non-zero values boosts performance,
because the receiver will grow only once instead of potentially many times and hash collisions get less probable.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix.html#ensureCapacity(int)">ensureCapacity</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix.html" title="class in cern.colt.matrix.impl">AbstractMatrix</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>minCapacity</CODE> - the desired minimum number of non-zero (non-null) cells.</DL>
</DD>
</DL>
<HR>
<A NAME="forEachNonZero(cern.colt.function.IntIntDoubleFunction)"><!-- --></A><H3>
forEachNonZero</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>forEachNonZero</B>(<A HREF="../../../../cern/colt/function/IntIntDoubleFunction.html" title="interface in cern.colt.function">IntIntDoubleFunction</A> function)</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></B></DD>
<DD>Assigns the result of a function to each <i>non-zero</i> cell; <tt>x[row,col] = function(x[row,col])</tt>.
Use this method for fast special-purpose iteration.
If you want to modify another matrix instead of <tt>this</tt> (i.e. work in read-only mode), simply return the input value unchanged.
Parameters to function are as follows: <tt>first==row</tt>, <tt>second==column</tt>, <tt>third==nonZeroValue</tt>.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#forEachNonZero(cern.colt.function.IntIntDoubleFunction)">forEachNonZero</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>function</CODE> - a function object taking as argument the current non-zero cell's row, column and value.
<DT><B>Returns:</B><DD><tt>this</tt> (for convenience only).</DL>
</DD>
</DL>
<HR>
<A NAME="getQuick(int, int)"><!-- --></A><H3>
getQuick</H3>
<PRE>
public double <B>getQuick</B>(int row,
int 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 <= column < columns() && 0 <= row < rows()</tt>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#getQuick(int, int)">getQuick</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</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/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>like</B>(int rows,
int 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>DenseDoubleMatrix2D</tt> the new matrix must also be of type <tt>DenseDoubleMatrix2D</tt>,
if the receiver is an instance of type <tt>SparseDoubleMatrix2D</tt> the new matrix must also be of type <tt>SparseDoubleMatrix2D</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/DoubleMatrix2D.html#like(int, int)">like</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</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/DoubleMatrix1D.html" title="class in cern.colt.matrix">DoubleMatrix1D</A> <B>like1D</B>(int 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>DenseDoubleMatrix2D</tt> the new matrix must be of type <tt>DenseDoubleMatrix1D</tt>,
if the receiver is an instance of type <tt>SparseDoubleMatrix2D</tt> the new matrix must be of type <tt>SparseDoubleMatrix1D</tt>, etc.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#like1D(int)">like1D</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</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, double)"><!-- --></A><H3>
setQuick</H3>
<PRE>
public void <B>setQuick</B>(int row,
int column,
double 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 <= column < columns() && 0 <= row < rows()</tt>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#setQuick(int, int, double)">setQuick</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</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>
<HR>
<A NAME="trimToSize()"><!-- --></A><H3>
trimToSize</H3>
<PRE>
public void <B>trimToSize</B>()</PRE>
<DL>
<DD>Releases any superfluous memory created by explicitly putting zero values into cells formerly having non-zero values;
An application can use this operation to minimize the
storage of the receiver.
<p>
<b>Background:</b>
<p>
Cells that <ul>
<li>are never set to non-zero values do not use any memory.
<li>switch from zero to non-zero state do use memory.
<li>switch back from non-zero to zero state also do use memory. However, their memory can be reclaimed by calling <tt>trimToSize()</tt>.
</ul>
A sequence like <tt>set(r,c,5); set(r,c,0);</tt>
sets a cell to non-zero state and later back to zero state.
Such as sequence generates obsolete memory that is automatically reclaimed from time to time or can manually be reclaimed by calling <tt>trimToSize()</tt>.
Putting zeros into cells already containing zeros does not generate obsolete memory since no memory was allocated to them in the first place.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix.html#trimToSize()">trimToSize</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/impl/AbstractMatrix.html" title="class in cern.colt.matrix.impl">AbstractMatrix</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="zMult(cern.colt.matrix.DoubleMatrix1D, cern.colt.matrix.DoubleMatrix1D, double, double, boolean)"><!-- --></A><H3>
zMult</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/DoubleMatrix1D.html" title="class in cern.colt.matrix">DoubleMatrix1D</A> <B>zMult</B>(<A HREF="../../../../cern/colt/matrix/DoubleMatrix1D.html" title="class in cern.colt.matrix">DoubleMatrix1D</A> y,
<A HREF="../../../../cern/colt/matrix/DoubleMatrix1D.html" title="class in cern.colt.matrix">DoubleMatrix1D</A> z,
double alpha,
double beta,
boolean transposeA)</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></B></DD>
<DD>Linear algebraic matrix-vector multiplication; <tt>z = alpha * A * y + beta*z</tt>.
<tt>z[i] = alpha*Sum(A[i,j] * y[j]) + beta*z[i], i=0..A.rows()-1, j=0..y.size()-1</tt>.
Where <tt>A == this</tt>.
<br>
Note: Matrix shape conformance is checked <i>after</i> potential transpositions.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#zMult(cern.colt.matrix.DoubleMatrix1D, cern.colt.matrix.DoubleMatrix1D, double, double, boolean)">zMult</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>y</CODE> - the source vector.<DD><CODE>z</CODE> - the vector where results are to be stored. Set this parameter to <tt>null</tt> to indicate that a new result vector shall be constructed.
<DT><B>Returns:</B><DD>z (for convenience only).</DL>
</DD>
</DL>
<HR>
<A NAME="zMult(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D, double, double, boolean, boolean)"><!-- --></A><H3>
zMult</H3>
<PRE>
public <A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> <B>zMult</B>(<A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> B,
<A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A> C,
double alpha,
double beta,
boolean transposeA,
boolean transposeB)</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></B></DD>
<DD>Linear algebraic matrix-matrix multiplication; <tt>C = alpha * A x B + beta*C</tt>.
<tt>C[i,j] = alpha*Sum(A[i,k] * B[k,j]) + beta*C[i,j], k=0..n-1</tt>.
<br>
Matrix shapes: <tt>A(m x n), B(n x p), C(m x p)</tt>.
<br>
Note: Matrix shape conformance is checked <i>after</i> potential transpositions.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html#zMult(cern.colt.matrix.DoubleMatrix2D, cern.colt.matrix.DoubleMatrix2D, double, double, boolean, boolean)">zMult</A></CODE> in class <CODE><A HREF="../../../../cern/colt/matrix/DoubleMatrix2D.html" title="class in cern.colt.matrix">DoubleMatrix2D</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>B</CODE> - the second source matrix.<DD><CODE>C</CODE> - the matrix where results are to be stored. Set this parameter to <tt>null</tt> to indicate that a new result matrix shall be constructed.
<DT><B>Returns:</B><DD>C (for convenience only).</DL>
</DD>
</DL>
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