org.netlib.lapack
Class DLAPLL

java.lang.Object
  org.netlib.lapack.DLAPLL

public class DLAPLL
extends java.lang.Object

DLAPLL is a simplified interface to the JLAPACK routine dlapll.
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
 *  =======
 *
 *  Given two column vectors X and Y, let
 *
 *                       A = ( X Y ).
 *
 *  The subroutine first computes the QR factorization of A = Q*R,
 *  and then computes the SVD of the 2-by-2 upper triangular matrix R.
 *  The smaller singular value of R is returned in SSMIN, which is used
 *  as the measurement of the linear dependency of the vectors X and Y.
 *
 *  Arguments
 *  =========
 *
 *  N       (input) INTEGER
 *          The length of the vectors X and Y.
 *
 *  X       (input/output) DOUBLE PRECISION array,
 *                         dimension (1+(N-1)*INCX)
 *          On entry, X contains the N-vector X.
 *          On exit, X is overwritten.
 *
 *  INCX    (input) INTEGER
 *          The increment between successive elements of X. INCX > 0.
 *
 *  Y       (input/output) DOUBLE PRECISION array,
 *                         dimension (1+(N-1)*INCY)
 *          On entry, Y contains the N-vector Y.
 *          On exit, Y is overwritten.
 *
 *  INCY    (input) INTEGER
 *          The increment between successive elements of Y. INCY > 0.
 *
 *  SSMIN   (output) DOUBLE PRECISION
 *          The smallest singular value of the N-by-2 matrix A = ( X Y ).
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Constructor Summary

DLAPLL()

Method Summary

static void

DLAPLL(int n, double[] x, int incx, double[] y, int incy, doubleW ssmin)

Methods inherited from class java.lang.Object

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

Constructor Detail

DLAPLL

public DLAPLL()

Method Detail

DLAPLL

public static void DLAPLL(int n,
                          double[] x,
                          int incx,
                          double[] y,
                          int incy,
                          doubleW ssmin)