org.netlib.blas
Class SROTM
java.lang.Object
org.netlib.blas.SROTM
public class SROTM
- extends java.lang.Object
SROTM is a simplified interface to the JLAPACK routine srotm.
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
* =======
*
* APPLY THE MODIFIED GIVENS TRANSFORMATION, H, TO THE 2 BY N MATRIX
*
* (SX**T) , WHERE **T INDICATES TRANSPOSE. THE ELEMENTS OF SX ARE IN
* (DX**T)
*
* SX(LX+I*INCX), I = 0 TO N-1, WHERE LX = 1 IF INCX .GE. 0, ELSE
* LX = (-INCX)*N, AND SIMILARLY FOR SY USING USING LY AND INCY.
* WITH SPARAM(1)=SFLAG, H HAS ONE OF THE FOLLOWING FORMS..
*
* SFLAG=-1.E0 SFLAG=0.E0 SFLAG=1.E0 SFLAG=-2.E0
*
* (SH11 SH12) (1.E0 SH12) (SH11 1.E0) (1.E0 0.E0)
* H=( ) ( ) ( ) ( )
* (SH21 SH22), (SH21 1.E0), (-1.E0 SH22), (0.E0 1.E0).
* SEE SROTMG FOR A DESCRIPTION OF DATA STORAGE IN SPARAM.
*
*
* Arguments
* =========
*
* N (input) INTEGER
* number of elements in input vector(s)
*
* SX (input/output) REAL array, dimension N
* double precision vector with 5 elements
*
* INCX (input) INTEGER
* storage spacing between elements of SX
*
* SY (input/output) REAL array, dimension N
* double precision vector with N elements
*
* INCY (input) INTEGER
* storage spacing between elements of SY
*
* SPARAM (input/output) REAL array, dimension 5
* SPARAM(1)=SFLAG
* SPARAM(2)=SH11
* SPARAM(3)=SH21
* SPARAM(4)=SH12
* SPARAM(5)=SH22
*
* =====================================================================
*
* .. Local Scalars ..
Constructor Summary |
SROTM()
|
Method Summary |
static void |
SROTM(int n,
float[] sx,
int incx,
float[] sy,
int incy,
float[] sparam)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SROTM
public SROTM()
SROTM
public static void SROTM(int n,
float[] sx,
int incx,
float[] sy,
int incy,
float[] sparam)