org.netlib.lapack
Class SGESC2

java.lang.Object
  extended by org.netlib.lapack.SGESC2

public class SGESC2
extends java.lang.Object

SGESC2 is a simplified interface to the JLAPACK routine sgesc2.
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 * ======= * * SGESC2 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 SGETC2. * * Arguments * ========= * * N (input) INTEGER * The order of the matrix A. * * A (input) REAL array, dimension (LDA,N) * On entry, the LU part of the factorization of the n-by-n * matrix A computed by SGETC2: A = P * L * U * Q * * LDA (input) INTEGER * The leading dimension of the array A. LDA >= max(1, N). * * RHS (input/output) REAL 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) REAL * 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
SGESC2()
           
 
Method Summary
static void SGESC2(int n, float[][] a, float[] rhs, int[] ipiv, int[] jpiv, floatW scale)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SGESC2

public SGESC2()
Method Detail

SGESC2

public static void SGESC2(int n,
                          float[][] a,
                          float[] rhs,
                          int[] ipiv,
                          int[] jpiv,
                          floatW scale)