org.netlib.lapack
Class Dorm2l

java.lang.Object
  org.netlib.lapack.Dorm2l

public class Dorm2l
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
 *  =======
 *
 *  DORM2L overwrites the general real m by n matrix C with
 *
 *        Q * C  if SIDE = 'L' and TRANS = 'N', or
 *
 *        Q'* C  if SIDE = 'L' and TRANS = 'T', or
 *
 *        C * Q  if SIDE = 'R' and TRANS = 'N', or
 *
 *        C * Q' if SIDE = 'R' and TRANS = 'T',
 *
 *  where Q is a real orthogonal matrix defined as the product of k
 *  elementary reflectors
 *
 *        Q = H(k) . . . H(2) H(1)
 *
 *  as returned by DGEQLF. Q is of order m if SIDE = 'L' and of order n
 *  if SIDE = 'R'.
 *
 *  Arguments
 *  =========
 *
 *  SIDE    (input) CHARACTER*1
 *          = 'L': apply Q or Q' from the Left
 *          = 'R': apply Q or Q' from the Right
 *
 *  TRANS   (input) CHARACTER*1
 *          = 'N': apply Q  (No transpose)
 *          = 'T': apply Q' (Transpose)
 *
 *  M       (input) INTEGER
 *          The number of rows of the matrix C. M >= 0.
 *
 *  N       (input) INTEGER
 *          The number of columns of the matrix C. N >= 0.
 *
 *  K       (input) INTEGER
 *          The number of elementary reflectors whose product defines
 *          the matrix Q.
 *          If SIDE = 'L', M >= K >= 0;
 *          if SIDE = 'R', N >= K >= 0.
 *
 *  A       (input) DOUBLE PRECISION array, dimension (LDA,K)
 *          The i-th column must contain the vector which defines the
 *          elementary reflector H(i), for i = 1,2,...,k, as returned by

 *          DGEQLF in the last k columns of its array argument A.
 *          A is modified by the routine but restored on exit.
 *
 *  LDA     (input) INTEGER
 *          The leading dimension of the array A.
 *          If SIDE = 'L', LDA >= max(1,M);
 *          if SIDE = 'R', LDA >= max(1,N).
 *
 *  TAU     (input) DOUBLE PRECISION array, dimension (K)
 *          TAU(i) must contain the scalar factor of the elementary
 *          reflector H(i), as returned by DGEQLF.
 *
 *  C       (input/output) DOUBLE PRECISION array, dimension (LDC,N)
 *          On entry, the m by n matrix C.
 *          On exit, C is overwritten by Q*C or Q'*C or C*Q' or C*Q.
 *
 *  LDC     (input) INTEGER
 *          The leading dimension of the array C. LDC >= max(1,M).
 *
 *  WORK    (workspace) DOUBLE PRECISION array, dimension
 *                                   (N) if SIDE = 'L',
 *                                   (M) if SIDE = 'R'
 *
 *  INFO    (output) INTEGER
 *          = 0: successful exit
 *          < 0: if INFO = -i, the i-th argument had an illegal value
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Constructor Summary

Dorm2l()

Method Summary

static void

dorm2l(java.lang.String side, java.lang.String trans, int m, int n, int k, double[] a, int _a_offset, int lda, double[] tau, int _tau_offset, double[] c, int _c_offset, int Ldc, double[] work, int _work_offset, intW info)

Methods inherited from class java.lang.Object

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

Constructor Detail

Dorm2l

public Dorm2l()

Method Detail

dorm2l

public static void dorm2l(java.lang.String side,
                          java.lang.String trans,
                          int m,
                          int n,
                          int k,
                          double[] a,
                          int _a_offset,
                          int lda,
                          double[] tau,
                          int _tau_offset,
                          double[] c,
                          int _c_offset,
                          int Ldc,
                          double[] work,
                          int _work_offset,
                          intW info)