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Class org.netlib.lapack.DORMQL

java.lang.Object
   |
   +----org.netlib.lapack.DORMQL

public class DORMQL

extends Object

DORMQL is a simplified interface to the JLAPACK routine dormql.
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
 *  =======
 *
 *  DORMQL overwrites the general real M-by-N matrix C with
 *
 *                  SIDE = 'L'     SIDE = 'R'
 *  TRANS = 'N':      Q * C          C * Q
 *  TRANS = 'T':      Q**T * C       C * Q**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**T from the Left;
 *          = 'R': apply Q or Q**T from the Right.
 *
 *  TRANS   (input) CHARACTER*1
 *          = 'N':  No transpose, apply Q;
 *          = 'T':  Transpose, apply Q**T.
 *
 *  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**T*C or C*Q**T or C*Q.
 *
 *  LDC     (input) INTEGER
 *          The leading dimension of the array C. LDC >= max(1,M).
 *
 *  WORK    (workspace/output) DOUBLE PRECISION array, dimension (LWORK)
 *          On exit, if INFO = 0, WORK(1) returns the optimal LWORK.
 *
 *  LWORK   (input) INTEGER
 *          The dimension of the array WORK.
 *          If SIDE = 'L', LWORK >= max(1,N);
 *          if SIDE = 'R', LWORK >= max(1,M).
 *          For optimum performance LWORK >= N*NB if SIDE = 'L', and
 *          LWORK >= M*NB if SIDE = 'R', where NB is the optimal
 *          blocksize.
 *
 *  INFO    (output) INTEGER
 *          = 0:  successful exit
 *          < 0:  if INFO = -i, the i-th argument had an illegal value
 *
 *  =====================================================================
 *
 *     .. Parameters ..

DORMQL()

DORMQL(String, String, int, int, int, double[][], double[], double[][], double[], int, intW)

 public DORMQL()

 public static void DORMQL(String side,
                           String trans,
                           int m,
                           int n,
                           int k,
                           double a[][],
                           double tau[],
                           double c[][],
                           double work[],
                           int lwork,
                           intW info)

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