org.netlib.lapack
Class SLASQ4
java.lang.Object
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.
*
* N0IN (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 ..
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 |
SLASQ4
public SLASQ4()
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)