matrix.html

Java方面的数值算法

<A NAME="Matrix(int, int)"><!-- --></A><H3>
Matrix</H3>
<PRE>
public <B>Matrix</B>(int&nbsp;m,
              int&nbsp;n)</PRE>
<DL>
<DD>Construct an m-by-n matrix of zeros.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>m</CODE> - Number of rows.<DD><CODE>n</CODE> - Number of colums.</DL>
</DL>
<HR>

<A NAME="Matrix(int, int, double)"><!-- --></A><H3>
Matrix</H3>
<PRE>
public <B>Matrix</B>(int&nbsp;m,
              int&nbsp;n,
              double&nbsp;s)</PRE>
<DL>
<DD>Construct an m-by-n constant matrix.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>m</CODE> - Number of rows.<DD><CODE>n</CODE> - Number of colums.<DD><CODE>s</CODE> - Fill the matrix with this scalar value.</DL>
</DL>
<HR>

<A NAME="Matrix(double[][])"><!-- --></A><H3>
Matrix</H3>
<PRE>
public <B>Matrix</B>(double[][]&nbsp;A)</PRE>
<DL>
<DD>Construct a matrix from a 2-D array.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>A</CODE> - Two-dimensional array of doubles.
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - All rows must have the same length<DT><B>See Also:</B><DD><A HREF="../../../../gov/nist/math/jama/Matrix.html#constructWithCopy(double[][])"><CODE>constructWithCopy(double[][])</CODE></A></DL>
</DL>
<HR>

<A NAME="Matrix(double[][], int, int)"><!-- --></A><H3>
Matrix</H3>
<PRE>
public <B>Matrix</B>(double[][]&nbsp;A,
              int&nbsp;m,
              int&nbsp;n)</PRE>
<DL>
<DD>Construct a matrix quickly without checking arguments.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>A</CODE> - Two-dimensional array of doubles.<DD><CODE>m</CODE> - Number of rows.<DD><CODE>n</CODE> - Number of colums.</DL>
</DL>
<HR>

<A NAME="Matrix(double[], int)"><!-- --></A><H3>
Matrix</H3>
<PRE>
public <B>Matrix</B>(double[]&nbsp;vals,
              int&nbsp;m)</PRE>
<DL>
<DD>Construct a matrix from a one-dimensional packed array
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>vals</CODE> - One-dimensional array of doubles, packed by columns (ala
            Fortran).<DD><CODE>m</CODE> - Number of rows.
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - Array length must be a multiple of m.</DL>
</DL>

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

<A NAME="method_detail"><!-- --></A>
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Method Detail</B></FONT></TH>
</TR>
</TABLE>

<A NAME="constructWithCopy(double[][])"><!-- --></A><H3>
constructWithCopy</H3>
<PRE>
public static <A HREF="../../../../gov/nist/math/jama/Matrix.html" title="class in gov.nist.math.jama">Matrix</A> <B>constructWithCopy</B>(double[][]&nbsp;A)</PRE>
<DL>
<DD>Construct a matrix from a copy of a 2-D array.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>A</CODE> - Two-dimensional array of doubles.
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - All rows must have the same length</DL>
</DD>
</DL>
<HR>

<A NAME="copy()"><!-- --></A><H3>
copy</H3>
<PRE>
public <A HREF="../../../../gov/nist/math/jama/Matrix.html" title="class in gov.nist.math.jama">Matrix</A> <B>copy</B>()</PRE>
<DL>
<DD>Make a deep copy of a matrix
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="clone()"><!-- --></A><H3>
clone</H3>
<PRE>
public java.lang.Object <B>clone</B>()</PRE>
<DL>
<DD>Clone the Matrix object.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>clone</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getArray()"><!-- --></A><H3>
getArray</H3>
<PRE>
public double[][] <B>getArray</B>()</PRE>
<DL>
<DD>Access the internal two-dimensional array.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Pointer to the two-dimensional array of matrix elements.</DL>
</DD>
</DL>
<HR>

<A NAME="getArrayCopy()"><!-- --></A><H3>
getArrayCopy</H3>
<PRE>
public double[][] <B>getArrayCopy</B>()</PRE>
<DL>
<DD>Copy the internal two-dimensional array.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Two-dimensional array copy of matrix elements.</DL>
</DD>
</DL>
<HR>

<A NAME="getColumnPackedCopy()"><!-- --></A><H3>
getColumnPackedCopy</H3>
<PRE>
public double[] <B>getColumnPackedCopy</B>()</PRE>
<DL>
<DD>Make a one-dimensional column packed copy of the internal array.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Matrix elements packed in a one-dimensional array by columns.</DL>
</DD>
</DL>
<HR>

<A NAME="getRowPackedCopy()"><!-- --></A><H3>
getRowPackedCopy</H3>
<PRE>
public double[] <B>getRowPackedCopy</B>()</PRE>
<DL>
<DD>Make a one-dimensional row packed copy of the internal array.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Matrix elements packed in a one-dimensional array by rows.</DL>
</DD>
</DL>
<HR>

<A NAME="getRowDimension()"><!-- --></A><H3>
getRowDimension</H3>
<PRE>
public int <B>getRowDimension</B>()</PRE>
<DL>
<DD>Get row dimension.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>m, the number of rows.</DL>
</DD>
</DL>
<HR>

<A NAME="getColumnDimension()"><!-- --></A><H3>
getColumnDimension</H3>
<PRE>
public int <B>getColumnDimension</B>()</PRE>
<DL>
<DD>Get column dimension.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>n, the number of columns.</DL>
</DD>
</DL>
<HR>

<A NAME="get(int, int)"><!-- --></A><H3>
get</H3>
<PRE>
public double <B>get</B>(int&nbsp;i,
                  int&nbsp;j)</PRE>
<DL>
<DD>Get a single element.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>i</CODE> - Row index.<DD><CODE>j</CODE> - Column index.
<DT><B>Returns:</B><DD>A(i,j)
<DT><B>Throws:</B>
<DD><CODE>java.lang.ArrayIndexOutOfBoundsException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="getMatrix(int, int, int, int)"><!-- --></A><H3>
getMatrix</H3>
<PRE>
public <A HREF="../../../../gov/nist/math/jama/Matrix.html" title="class in gov.nist.math.jama">Matrix</A> <B>getMatrix</B>(int&nbsp;i0,
                        int&nbsp;i1,
                        int&nbsp;j0,
                        int&nbsp;j1)</PRE>
<DL>
<DD>Get a submatrix.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>i0</CODE> - Initial row index<DD><CODE>i1</CODE> - Final row index<DD><CODE>j0</CODE> - Initial column index<DD><CODE>j1</CODE> - Final column index
<DT><B>Returns:</B><DD>A(i0:i1,j0:j1)
<DT><B>Throws:</B>
<DD><CODE>java.lang.ArrayIndexOutOfBoundsException</CODE> - Submatrix indices</DL>
</DD>
</DL>
<HR>

<A NAME="getMatrix(int[], int[])"><!-- --></A><H3>
getMatrix</H3>
<PRE>
public <A HREF="../../../../gov/nist/math/jama/Matrix.html" title="class in gov.nist.math.jama">Matrix</A> <B>getMatrix</B>(int[]&nbsp;r,
                        int[]&nbsp;c)</PRE>
<DL>
<DD>Get a submatrix.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>r</CODE> - Array of row indices.<DD><CODE>c</CODE> - Array of column indices.
<DT><B>Returns:</B><DD>A(r(:),c(:))
<DT><B>Throws:</B>
<DD><CODE>java.lang.ArrayIndexOutOfBoundsException</CODE> - Submatrix indices</DL>
</DD>
</DL>
<HR>

<A NAME="getMatrix(int, int, int[])"><!-- --></A><H3>
getMatrix</H3>
<PRE>
public <A HREF="../../../../gov/nist/math/jama/Matrix.html" title="class in gov.nist.math.jama">Matrix</A> <B>getMatrix</B>(int&nbsp;i0,
                        int&nbsp;i1,
                        int[]&nbsp;c)</PRE>
<DL>
<DD>Get a submatrix.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>i0</CODE> - Initial row index<DD><CODE>i1</CODE> - Final row index<DD><CODE>c</CODE> - Array of column indices.
<DT><B>Returns:</B><DD>A(i0:i1,c(:))
<DT><B>Throws:</B>
<DD><CODE>java.lang.ArrayIndexOutOfBoundsException</CODE> - Submatrix indices</DL>
</DD>
</DL>
<HR>

<A NAME="getMatrix(int[], int, int)"><!-- --></A><H3>
getMatrix</H3>
<PRE>
public <A HREF="../../../../gov/nist/math/jama/Matrix.html" title="class in gov.nist.math.jama">Matrix</A> <B>getMatrix</B>(int[]&nbsp;r,
                        int&nbsp;j0,
                        int&nbsp;j1)</PRE>
<DL>
<DD>Get a submatrix.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>r</CODE> - Array of row indices.<DD><CODE>i0</CODE> - Initial column index<DD><CODE>i1</CODE> - Final column index
<DT><B>Returns:</B><DD>A(r(:),j0:j1)
<DT><B>Throws:</B>
<DD><CODE>java.lang.ArrayIndexOutOfBoundsException</CODE> - Submatrix indices</DL>
</DD>
</DL>
<HR>

<A NAME="set(int, int, double)"><!-- --></A><H3>
set</H3>
<PRE>
public void <B>set</B>(int&nbsp;i,
                int&nbsp;j,
                double&nbsp;s)</PRE>
<DL>
<DD>Set a single element.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>i</CODE> - Row index.<DD><CODE>j</CODE> - Column index.<DD><CODE>s</CODE> - A(i,j).
<DT><B>Throws:</B>
<DD><CODE>java.lang.ArrayIndexOutOfBoundsException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="setMatrix(int, int, int, int, gov.nist.math.jama.Matrix)"><!-- --></A><H3>
setMatrix</H3>
<PRE>
public void <B>setMatrix</B>(int&nbsp;i0,
                      int&nbsp;i1,
                      int&nbsp;j0,