org.netlib.lapack
Class DGESC2

java.lang.Object
  extended by org.netlib.lapack.DGESC2

public class DGESC2
extends java.lang.Object

DGESC2 is a simplified interface to the JLAPACK routine dgesc2.
This interface converts Java-style 2D row-major arrays into
the 1D column-major linearized arrays expected by the lower
level JLAPACK routines.  Using this interface also allows you
to omit offset and leading dimension arguments.  However, because
of these conversions, these routines will be slower than the low
level ones.  Following is the description from the original Fortran
source.  Contact seymour@cs.utk.edu with any questions.

* .. * * Purpose * ======= * * DGESC2 solves a system of linear equations * * A * X = scale* RHS * * with a general N-by-N matrix A using the LU factorization with * complete pivoting computed by DGETC2. * * Arguments * ========= * * N (input) INTEGER * The order of the matrix A. * * A (input) DOUBLE PRECISION array, dimension (LDA,N) * On entry, the LU part of the factorization of the n-by-n * matrix A computed by DGETC2: A = P * L * U * Q * * LDA (input) INTEGER * The leading dimension of the array A. LDA >= max(1, N). * * RHS (input/output) DOUBLE PRECISION array, dimension (N). * On entry, the right hand side vector b. * On exit, the solution vector X. * * IPIV (iput) INTEGER array, dimension (N). * The pivot indices; for 1 <= i <= N, row i of the * matrix has been interchanged with row IPIV(i). * * JPIV (iput) INTEGER array, dimension (N). * The pivot indices; for 1 <= j <= N, column j of the * matrix has been interchanged with column JPIV(j). * * SCALE (output) DOUBLE PRECISION * On exit, SCALE contains the scale factor. SCALE is chosen * 0 <= SCALE <= 1 to prevent owerflow in the solution. * * Further Details * =============== * * Based on contributions by * Bo Kagstrom and Peter Poromaa, Department of Computing Science, * Umea University, S-901 87 Umea, Sweden. * * ===================================================================== * * .. Parameters ..


Constructor Summary
DGESC2()
           
 
Method Summary
static void DGESC2(int n, double[][] a, double[] rhs, int[] ipiv, int[] jpiv, doubleW scale)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DGESC2

public DGESC2()
Method Detail

DGESC2

public static void DGESC2(int n,
                          double[][] a,
                          double[] rhs,
                          int[] ipiv,
                          int[] jpiv,
                          doubleW scale)