org.netlib.lapack
Class DLASQ6

java.lang.Object
  org.netlib.lapack.DLASQ6

public class DLASQ6
extends java.lang.Object

DLASQ6 is a simplified interface to the JLAPACK routine dlasq6.
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
 *  =======
 *
 *  DLASQ6 computes one dqd (shift equal to zero) transform in
 *  ping-pong form, with protection against underflow and overflow.
 *
 *  Arguments
 *  =========
 *
 *  I0    (input) INTEGER
 *        First index.
 *
 *  N0    (input) INTEGER
 *        Last index.
 *
 *  Z     (input) DOUBLE PRECISION array, dimension ( 4*N )
 *        Z holds the qd array. EMIN is stored in Z(4*N0) to avoid
 *        an extra argument.
 *
 *  PP    (input) INTEGER
 *        PP=0 for ping, PP=1 for pong.
 *
 *  DMIN  (output) DOUBLE PRECISION
 *        Minimum value of d.
 *
 *  DMIN1 (output) DOUBLE PRECISION
 *        Minimum value of d, excluding D( N0 ).
 *
 *  DMIN2 (output) DOUBLE PRECISION
 *        Minimum value of d, excluding D( N0 ) and D( N0-1 ).
 *
 *  DN    (output) DOUBLE PRECISION
 *        d(N0), the last value of d.
 *
 *  DNM1  (output) DOUBLE PRECISION
 *        d(N0-1).
 *
 *  DNM2  (output) DOUBLE PRECISION
 *        d(N0-2).
 *
 *  =====================================================================
 *
 *     .. Parameter ..

Constructor Summary

DLASQ6()

Method Summary

static void

DLASQ6(int i0, int n0, double[] z, int pp, doubleW dmin, doubleW dmin1, doubleW dmin2, doubleW dn, doubleW dnm1, doubleW dnm2)

Methods inherited from class java.lang.Object

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

Constructor Detail

DLASQ6

public DLASQ6()

Method Detail

DLASQ6

public static void DLASQ6(int i0,
                          int n0,
                          double[] z,
                          int pp,
                          doubleW dmin,
                          doubleW dmin1,
                          doubleW dmin2,
                          doubleW dn,
                          doubleW dnm1,
                          doubleW dnm2)