org.netlib.lapack
Class DLASQ5

java.lang.Object
  org.netlib.lapack.DLASQ5

public class DLASQ5
extends java.lang.Object

DLASQ5 is a simplified interface to the JLAPACK routine dlasq5.
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
 *  =======
 *
 *  DLASQ5 computes one dqds transform in ping-pong form, one
 *  version for IEEE machines another for non IEEE machines.
 *
 *  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.
 *
 *  TAU   (input) DOUBLE PRECISION
 *        This is the shift.
 *
 *  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).
 *
 *  IEEE  (input) LOGICAL
 *        Flag for IEEE or non IEEE arithmetic.
 *
 *  =====================================================================
 *
 *     .. Parameter ..

Constructor Summary

DLASQ5()

Method Summary

static void

DLASQ5(int i0, int n0, double[] z, int pp, double tau, doubleW dmin, doubleW dmin1, doubleW dmin2, doubleW dn, doubleW dnm1, doubleW dnm2, boolean ieee)

Methods inherited from class java.lang.Object

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

Constructor Detail

DLASQ5

public DLASQ5()

Method Detail

DLASQ5

public static void DLASQ5(int i0,
                          int n0,
                          double[] z,
                          int pp,
                          double tau,
                          doubleW dmin,
                          doubleW dmin1,
                          doubleW dmin2,
                          doubleW dn,
                          doubleW dnm1,
                          doubleW dnm2,
                          boolean ieee)