org.netlib.lapack
Class SLARZ

java.lang.Object
  org.netlib.lapack.SLARZ

public class SLARZ
extends java.lang.Object

SLARZ is a simplified interface to the JLAPACK routine slarz.
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
 *  =======
 *
 *  SLARZ 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.
 *
 *
 *  H is a product of k elementary reflectors as returned by STZRZF.
 *
 *  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.
 *
 *  L       (input) INTEGER
 *          The number of entries of the vector V containing
 *          the meaningful part of the Householder vectors.
 *          If SIDE = 'L', M >= L >= 0, if SIDE = 'R', N >= L >= 0.
 *
 *  V       (input) REAL array, dimension (1+(L-1)*abs(INCV))
 *          The vector v in the representation of H as returned by
 *          STZRZF. V is not used if TAU = 0.
 *
 *  INCV    (input) INTEGER
 *          The increment between elements of v. INCV <> 0.
 *
 *  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. LDC >= max(1,M).
 *
 *  WORK    (workspace) REAL array, dimension
 *                         (N) if SIDE = 'L'
 *                      or (M) if SIDE = 'R'
 *
 *  Further Details
 *  ===============
 *
 *  Based on contributions by
 *    A. Petitet, Computer Science Dept., Univ. of Tenn., Knoxville, USA

 *
 *  =====================================================================
 *
 *     .. Parameters ..

Constructor Summary

SLARZ()

Method Summary

static void

SLARZ(java.lang.String side, int m, int n, int l, float[] v, int incv, float tau, float[][] c, float[] work)

Methods inherited from class java.lang.Object

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

Constructor Detail

SLARZ

public SLARZ()

Method Detail

SLARZ

public static void SLARZ(java.lang.String side,
                         int m,
                         int n,
                         int l,
                         float[] v,
                         int incv,
                         float tau,
                         float[][] c,
                         float[] work)