org.netlib.lapack
Class DGECON

java.lang.Object
  org.netlib.lapack.DGECON

public class DGECON
extends java.lang.Object

DGECON is a simplified interface to the JLAPACK routine dgecon.
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
 *  =======
 *
 *  DGECON estimates the reciprocal of the condition number of a general

 *  real matrix A, in either the 1-norm or the infinity-norm, using
 *  the LU factorization computed by DGETRF.
 *
 *  An estimate is obtained for norm(inv(A)), and the reciprocal of the
 *  condition number is computed as
 *     RCOND = 1 / ( norm(A) * norm(inv(A)) ).
 *
 *  Arguments
 *  =========
 *
 *  NORM    (input) CHARACTER*1
 *          Specifies whether the 1-norm condition number or the
 *          infinity-norm condition number is required:
 *          = '1' or 'O':  1-norm;
 *          = 'I':         Infinity-norm.
 *
 *  N       (input) INTEGER
 *          The order of the matrix A.  N >= 0.
 *
 *  A       (input) DOUBLE PRECISION array, dimension (LDA,N)
 *          The factors L and U from the factorization A = P*L*U
 *          as computed by DGETRF.
 *
 *  LDA     (input) INTEGER
 *          The leading dimension of the array A.  LDA >= max(1,N).
 *
 *  ANORM   (input) DOUBLE PRECISION
 *          If NORM = '1' or 'O', the 1-norm of the original matrix A.
 *          If NORM = 'I', the infinity-norm of the original matrix A.
 *
 *  RCOND   (output) DOUBLE PRECISION
 *          The reciprocal of the condition number of the matrix A,
 *          computed as RCOND = 1/(norm(A) * norm(inv(A))).
 *
 *  WORK    (workspace) DOUBLE PRECISION array, dimension (4*N)
 *
 *  IWORK   (workspace) INTEGER array, dimension (N)
 *
 *  INFO    (output) INTEGER
 *          = 0:  successful exit
 *          < 0:  if INFO = -i, the i-th argument had an illegal value
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Constructor Summary

DGECON()

Method Summary

static void

DGECON(java.lang.String norm, int n, double[][] a, double anorm, doubleW rcond, double[] work, int[] iwork, intW info)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DGECON

public DGECON()

Method Detail

DGECON

public static void DGECON(java.lang.String norm,
                          int n,
                          double[][] a,
                          double anorm,
                          doubleW rcond,
                          double[] work,
                          int[] iwork,
                          intW info)