org.netlib.lapack
Class SLASQ4

java.lang.Object
  extended by org.netlib.lapack.SLASQ4

public class SLASQ4
extends java.lang.Object

SLASQ4 is a simplified interface to the JLAPACK routine slasq4.
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 * ======= * * SLASQ4 computes an approximation TAU to the smallest eigenvalue * using values of d from the previous transform. * * I0 (input) INTEGER * First index. * * N0 (input) INTEGER * Last index. * * Z (input) REAL array, dimension ( 4*N ) * Z holds the qd array. * * PP (input) INTEGER * PP=0 for ping, PP=1 for pong. * * NOIN (input) INTEGER * The value of N0 at start of EIGTEST. * * DMIN (input) REAL * Minimum value of d. * * DMIN1 (input) REAL * Minimum value of d, excluding D( N0 ). * * DMIN2 (input) REAL * Minimum value of d, excluding D( N0 ) and D( N0-1 ). * * DN (input) REAL * d(N) * * DN1 (input) REAL * d(N-1) * * DN2 (input) REAL * d(N-2) * * TAU (output) REAL * This is the shift. * * TTYPE (output) INTEGER * Shift type. * * Further Details * =============== * CNST1 = 9/16 * * ===================================================================== * * .. Parameters ..


Constructor Summary
SLASQ4()
           
 
Method Summary
static void SLASQ4(int i0, int n0, float[] z, int pp, int n0in, float dmin, float dmin1, float dmin2, float dn, float dn1, float dn2, floatW tau, intW ttype)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SLASQ4

public SLASQ4()
Method Detail

SLASQ4

public static void SLASQ4(int i0,
                          int n0,
                          float[] z,
                          int pp,
                          int n0in,
                          float dmin,
                          float dmin1,
                          float dmin2,
                          float dn,
                          float dn1,
                          float dn2,
                          floatW tau,
                          intW ttype)