org.netlib.lapack
Class SLARFX
java.lang.Object
org.netlib.lapack.SLARFX
public class SLARFX
- extends java.lang.Object
SLARFX is a simplified interface to the JLAPACK routine slarfx.
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
* =======
*
* SLARFX applies a real elementary reflector H to a real m by n
* matrix C, from either the left or the right. H is represented in the
* form
*
* H = I - tau * v * v'
*
* where tau is a real scalar and v is a real vector.
*
* If tau = 0, then H is taken to be the unit matrix
*
* This version uses inline code if H has order < 11.
*
* Arguments
* =========
*
* SIDE (input) CHARACTER*1
* = 'L': form H * C
* = 'R': form C * H
*
* M (input) INTEGER
* The number of rows of the matrix C.
*
* N (input) INTEGER
* The number of columns of the matrix C.
*
* V (input) REAL array, dimension (M) if SIDE = 'L'
* or (N) if SIDE = 'R'
* The vector v in the representation of H.
*
* TAU (input) REAL
* The value tau in the representation of H.
*
* C (input/output) REAL array, dimension (LDC,N)
* On entry, the m by n matrix C.
* On exit, C is overwritten by the matrix H * C if SIDE = 'L',
* or C * H if SIDE = 'R'.
*
* LDC (input) INTEGER
* The leading dimension of the array C. LDA >= (1,M).
*
* WORK (workspace) REAL array, dimension
* (N) if SIDE = 'L'
* or (M) if SIDE = 'R'
* WORK is not referenced if H has order < 11.
*
* =====================================================================
*
* .. Parameters ..
Method Summary |
static void |
SLARFX(java.lang.String side,
int m,
int n,
float[] v,
float tau,
float[][] c,
float[] work)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SLARFX
public SLARFX()
SLARFX
public static void SLARFX(java.lang.String side,
int m,
int n,
float[] v,
float tau,
float[][] c,
float[] work)