zqrt15.f - Man Page

subroutine zqrt15 (scale, rksel, m, n, nrhs, a, lda, b, ldb, s, rank, norma, normb, iseed, work, lwork)
ZQRT15

ZQRT15

Purpose:

 ZQRT15 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 COMPLEX*16 array, dimension (LDA,N)
          The M-by-N matrix A.

LDA

          LDA is INTEGER
          The leading dimension of the array A.

B

          B is COMPLEX*16 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 norm of A.

NORMB

          NORMB is DOUBLE PRECISION
          one-norm norm of B.

ISEED

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

WORK

          WORK is COMPLEX*16 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 147 of file zqrt15.f.