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 is INTEGER


          The number of rows of the matrix A.



          N is INTEGER


          The number of columns of A.

NRHS



          NRHS is INTEGER


          The number of columns of B.



          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 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 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

Generated automatically by Doxygen for LAPACK from the source code.