TESTING/LIN/dqrt15.f(3)

NAME
TESTING/LIN/dqrt15.f

SYNOPSIS

  Functions/Subroutines
subroutine dqrt15 (scale, rksel, m, n, nrhs, a, lda, b, ldb, s, rank, norma, normb, iseed, work, lwork)
DQRT15

Function/Subroutine Documentation

  subroutine dqrt15 (integer scale, integer rksel, integer m, integer n, integer nrhs, double precision, dimension( lda, * ) a, integer lda, double precision, dimension( ldb, * ) b, integer ldb, double precision, dimension( * ) s, integer rank, double precision norma, double precision normb, integer, dimension( 4 ) iseed, double precision, dimension( lwork ) work, integer lwork)

DQRT15

Purpose:

     DQRT15 generates a matrix with full or deficient rank and of various
     norms.

Parameters
    SCALE

              SCALE is INTEGER
              SCALE = 1: normally scaled matrix
              SCALE = 2: matrix scaled up
              SCALE = 3: matrix scaled down

    RKSEL

              RKSEL is INTEGER
              RKSEL = 1: full rank matrix
              RKSEL = 2: rank-deficient matrix

    M

              M is INTEGER
              The number of rows of the matrix A.

    N

              N is INTEGER
              The number of columns of A.

    NRHS

              NRHS is INTEGER
              The number of columns of B.

    A

              A is DOUBLE PRECISION array, dimension (LDA,N)
              The M-by-N matrix A.

    LDA

              LDA is INTEGER
              The leading dimension of the array A.

    B

              B is DOUBLE PRECISION array, dimension (LDB, NRHS)
              A matrix that is in the range space of matrix A.

    LDB

              LDB is INTEGER
              The leading dimension of the array B.

    S

              S is DOUBLE PRECISION array, dimension MIN(M,N)
              Singular values of A.

    RANK

              RANK is INTEGER
              number of nonzero singular values of A.

    NORMA

              NORMA is DOUBLE PRECISION
              one-norm of A.

    NORMB

              NORMB is DOUBLE PRECISION
              one-norm of B.

    ISEED

              ISEED is integer array, dimension (4)
              seed for random number generator.

    WORK

              WORK is DOUBLE PRECISION array, dimension (LWORK)

    LWORK

              LWORK is INTEGER
              length of work space required.
              LWORK >= MAX(M+MIN(M,N),NRHS*MIN(M,N),2*N+M)

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 146 of file dqrt15.f.

Author

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