TESTING/LIN/sqrt15.f(3)

NAME
TESTING/LIN/sqrt15.f

SYNOPSIS

  Functions/Subroutines
subroutine sqrt15 (scale, rksel, m, n, nrhs, a, lda, b, ldb, s, rank, norma, normb, iseed, work, lwork)
SQRT15

Function/Subroutine Documentation

  subroutine sqrt15 (integer scale, integer rksel, integer m, integer n, integer nrhs, real, dimension( lda, * ) a, integer lda, real, dimension( ldb, * ) b, integer ldb, real, dimension( * ) s, integer rank, real norma, real normb, integer, dimension( 4 ) iseed, real, dimension( lwork ) work, integer lwork)

SQRT15

Purpose:

     SQRT15 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 REAL array, dimension (LDA,N)
              The M-by-N matrix A.

    LDA

              LDA is INTEGER
              The leading dimension of the array A.

    B

              B is REAL 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 REAL array, dimension MIN(M,N)
              Singular values of A.

    RANK

              RANK is INTEGER
              number of nonzero singular values of A.

    NORMA

              NORMA is REAL
              one-norm of A.

    NORMB

              NORMB is REAL
              one-norm of B.

    ISEED

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

    WORK

              WORK is REAL 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 sqrt15.f.

Author

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