org.netlib.lapack
Class Slarfg

java.lang.Object
  org.netlib.lapack.Slarfg

public class Slarfg
extends java.lang.Object

Following is the description from the original
Fortran source.  For each array argument, the Java
version will include an integer offset parameter, so
the arguments may not match the description exactly.
Contact seymour@cs.utk.edu with any questions.


 *     ..
 *
 *  Purpose
 *  =======
 *
 *  SLARFG generates a real elementary reflector H of order n, such
 *  that
 *
 *        H * ( alpha ) = ( beta ),   H' * H = I.
 *            (   x   )   (   0  )
 *
 *  where alpha and beta are scalars, and x is an (n-1)-element real
 *  vector. H is represented in the form
 *
 *        H = I - tau * ( 1 ) * ( 1 v' ) ,
 *                      ( v )
 *
 *  where tau is a real scalar and v is a real (n-1)-element
 *  vector.
 *
 *  If the elements of x are all zero, then tau = 0 and H is taken to be

 *  the unit matrix.
 *
 *  Otherwise  1 <= tau <= 2.
 *
 *  Arguments
 *  =========
 *
 *  N       (input) INTEGER
 *          The order of the elementary reflector.
 *
 *  ALPHA   (input/output) REAL
 *          On entry, the value alpha.
 *          On exit, it is overwritten with the value beta.
 *
 *  X       (input/output) REAL array, dimension
 *                         (1+(N-2)*abs(INCX))
 *          On entry, the vector x.
 *          On exit, it is overwritten with the vector v.
 *
 *  INCX    (input) INTEGER
 *          The increment between elements of X. INCX > 0.
 *
 *  TAU     (output) REAL
 *          The value tau.
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Constructor Summary

Slarfg()

Method Summary

static void

slarfg(int n, floatW alpha, float[] x, int _x_offset, int incx, floatW tau)

Methods inherited from class java.lang.Object

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

Constructor Detail

Slarfg

public Slarfg()

Method Detail

slarfg

public static void slarfg(int n,
                          floatW alpha,
                          float[] x,
                          int _x_offset,
                          int incx,
                          floatW tau)