org.netlib.lapack
Class SSPCON

java.lang.Object
  org.netlib.lapack.SSPCON

public class SSPCON
extends java.lang.Object

SSPCON is a simplified interface to the JLAPACK routine sspcon.
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
 *  =======
 *
 *  SSPCON estimates the reciprocal of the condition number (in the
 *  1-norm) of a real symmetric packed matrix A using the factorization
 *  A = U*D*U**T or A = L*D*L**T computed by SSPTRF.
 *
 *  An estimate is obtained for norm(inv(A)), and the reciprocal of the
 *  condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))).
 *
 *  Arguments
 *  =========
 *
 *  UPLO    (input) CHARACTER*1
 *          Specifies whether the details of the factorization are stored
 *          as an upper or lower triangular matrix.
 *          = 'U':  Upper triangular, form is A = U*D*U**T;
 *          = 'L':  Lower triangular, form is A = L*D*L**T.
 *
 *  N       (input) INTEGER
 *          The order of the matrix A.  N >= 0.
 *
 *  AP      (input) REAL array, dimension (N*(N+1)/2)
 *          The block diagonal matrix D and the multipliers used to
 *          obtain the factor U or L as computed by SSPTRF, stored as a
 *          packed triangular matrix.
 *
 *  IPIV    (input) INTEGER array, dimension (N)
 *          Details of the interchanges and the block structure of D
 *          as determined by SSPTRF.
 *
 *  ANORM   (input) REAL
 *          The 1-norm of the original matrix A.
 *
 *  RCOND   (output) REAL
 *          The reciprocal of the condition number of the matrix A,
 *          computed as RCOND = 1/(ANORM * AINVNM), where AINVNM is an
 *          estimate of the 1-norm of inv(A) computed in this routine.
 *
 *  WORK    (workspace) REAL array, dimension (2*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

SSPCON()

Method Summary

static void

SSPCON(java.lang.String uplo, int n, float[] ap, int[] ipiv, float anorm, floatW rcond, float[] 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

SSPCON

public SSPCON()

Method Detail

SSPCON

public static void SSPCON(java.lang.String uplo,
                          int n,
                          float[] ap,
                          int[] ipiv,
                          float anorm,
                          floatW rcond,
                          float[] work,
                          int[] iwork,
                          intW info)