org.netlib.lapack
Class SPOCON

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

public class SPOCON
extends java.lang.Object

SPOCON is a simplified interface to the JLAPACK routine spocon.
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 * ======= * * SPOCON estimates the reciprocal of the condition number (in the * 1-norm) of a real symmetric positive definite matrix using the * Cholesky factorization A = U**T*U or A = L*L**T computed by SPOTRF. * * 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 * = 'U': Upper triangle of A is stored; * = 'L': Lower triangle of A is stored. * * N (input) INTEGER * The order of the matrix A. N >= 0. * * A (input) REAL array, dimension (LDA,N) * The triangular factor U or L from the Cholesky factorization * A = U**T*U or A = L*L**T, as computed by SPOTRF. * * LDA (input) INTEGER * The leading dimension of the array A. LDA >= max(1,N). * * ANORM (input) REAL * The 1-norm (or infinity-norm) of the symmetric 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 (3*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
SPOCON()
           
 
Method Summary
static void SPOCON(java.lang.String uplo, int n, float[][] a, 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

SPOCON

public SPOCON()
Method Detail

SPOCON

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