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Class org.netlib.lapack.DGERQS

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

public class DGERQS

extends Object

DGERQS is a simplified interface to the JLAPACK routine dgerqs.
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
 *  =======
 *
 *  Compute a minimum-norm solution
 *      min || A*X - B ||
 *  using the RQ factorization
 *      A = R*Q
 *  computed by DGERQF.
 *
 *  Arguments
 *  =========
 *
 *  M       (input) INTEGER
 *          The number of rows of the matrix A.  M >= 0.
 *
 *  N       (input) INTEGER
 *          The number of columns of the matrix A.  N >= M >= 0.
 *
 *  NRHS    (input) INTEGER
 *          The number of columns of B.  NRHS >= 0.
 *
 *  A       (input) DOUBLE PRECISION array, dimension (LDA,N)
 *          Details of the RQ factorization of the original matrix A as
 *          returned by DGERQF.
 *
 *  LDA     (input) INTEGER
 *          The leading dimension of the array A.  LDA >= M.
 *
 *  TAU     (input) DOUBLE PRECISION array, dimension (M)
 *          Details of the orthogonal matrix Q.
 *
 *  B       (input/output) DOUBLE PRECISION array, dimension (LDB,NRHS)
 *          On entry, the right hand side vectors for the linear system.
 *          On exit, the solution vectors X.  Each solution vector
 *          is contained in rows 1:N of a column of B.
 *
 *  LDB     (input) INTEGER
 *          The leading dimension of the array B. LDB >= max(1,N).
 *
 *  WORK    (workspace) DOUBLE PRECISION array, dimension (LWORK)
 *
 *  LWORK   (input) INTEGER
 *          The length of the array WORK.  LWORK must be at least NRHS,
 *          and should be at least NRHS*NB, where NB is the block size
 *          for this environment.
 *
 *  INFO    (output) INTEGER
 *          = 0: successful exit
 *          < 0: if INFO = -i, the i-th argument had an illegal value
 *
 *  =====================================================================
 *
 *     .. Parameters ..

DGERQS()

DGERQS(int, int, int, double[][], double[], double[][], double[], int, intW)

 public DGERQS()

 public static void DGERQS(int m,
                           int n,
                           int nrhs,
                           double a[][],
                           double tau[],
                           double b[][],
                           double work[],
                           int lwork,
                           intW info)

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