org.netlib.lapack
Class DLARZB

java.lang.Object
  org.netlib.lapack.DLARZB

public class DLARZB
extends java.lang.Object

DLARZB is a simplified interface to the JLAPACK routine dlarzb.
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
 *  =======
 *
 *  DLARZB applies a real block reflector H or its transpose H**T to
 *  a real distributed M-by-N  C from the left or the right.
 *
 *  Currently, only STOREV = 'R' and DIRECT = 'B' are supported.
 *
 *  Arguments
 *  =========
 *
 *  SIDE    (input) CHARACTER*1
 *          = 'L': apply H or H' from the Left
 *          = 'R': apply H or H' from the Right
 *
 *  TRANS   (input) CHARACTER*1
 *          = 'N': apply H (No transpose)
 *          = 'C': apply H' (Transpose)
 *
 *  DIRECT  (input) CHARACTER*1
 *          Indicates how H is formed from a product of elementary
 *          reflectors
 *          = 'F': H = H(1) H(2) . . . H(k) (Forward, not supported yet)

 *          = 'B': H = H(k) . . . H(2) H(1) (Backward)
 *
 *  STOREV  (input) CHARACTER*1
 *          Indicates how the vectors which define the elementary
 *          reflectors are stored:
 *          = 'C': Columnwise                        (not supported yet)

 *          = 'R': Rowwise
 *
 *  M       (input) INTEGER
 *          The number of rows of the matrix C.
 *
 *  N       (input) INTEGER
 *          The number of columns of the matrix C.
 *
 *  K       (input) INTEGER
 *          The order of the matrix T (= the number of elementary
 *          reflectors whose product defines the block reflector).
 *
 *  L       (input) INTEGER
 *          The number of columns of the matrix V containing the
 *          meaningful part of the Householder reflectors.
 *          If SIDE = 'L', M >= L >= 0, if SIDE = 'R', N >= L >= 0.
 *
 *  V       (input) DOUBLE PRECISION array, dimension (LDV,NV).
 *          If STOREV = 'C', NV = K; if STOREV = 'R', NV = L.
 *
 *  LDV     (input) INTEGER
 *          The leading dimension of the array V.
 *          If STOREV = 'C', LDV >= L; if STOREV = 'R', LDV >= K.
 *
 *  T       (input) DOUBLE PRECISION array, dimension (LDT,K)
 *          The triangular K-by-K matrix T in the representation of the
 *          block reflector.
 *
 *  LDT     (input) INTEGER
 *          The leading dimension of the array T. LDT >= K.
 *
 *  C       (input/output) DOUBLE PRECISION array, dimension (LDC,N)
 *          On entry, the M-by-N matrix C.
 *          On exit, C is overwritten by H*C or H'*C or C*H or C*H'.
 *
 *  LDC     (input) INTEGER
 *          The leading dimension of the array C. LDC >= max(1,M).
 *
 *  WORK    (workspace) DOUBLE PRECISION array, dimension (LDWORK,K)
 *
 *  LDWORK  (input) INTEGER
 *          The leading dimension of the array WORK.
 *          If SIDE = 'L', LDWORK >= max(1,N);
 *          if SIDE = 'R', LDWORK >= max(1,M).
 *
 *  Further Details
 *  ===============
 *
 *  Based on contributions by
 *    A. Petitet, Computer Science Dept., Univ. of Tenn., Knoxville, USA

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

Constructor Summary

DLARZB()

Method Summary

static void

DLARZB(java.lang.String side, java.lang.String trans, java.lang.String direct, java.lang.String storev, int m, int n, int k, int l, double[][] v, double[][] t, double[][] c, double[][] work)

Methods inherited from class java.lang.Object

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

Constructor Detail

DLARZB

public DLARZB()

Method Detail

DLARZB

public static void DLARZB(java.lang.String side,
                          java.lang.String trans,
                          java.lang.String direct,
                          java.lang.String storev,
                          int m,
                          int n,
                          int k,
                          int l,
                          double[][] v,
                          double[][] t,
                          double[][] c,
                          double[][] work)