TESTING/LIN/sget04.f(3)    Library Functions Manual    TESTING/LIN/sget04.f(3)

NAME
       TESTING/LIN/sget04.f

SYNOPSIS
   Functions/Subroutines
       subroutine sget04 (n, nrhs, x, ldx, xact, ldxact, rcond, resid)
           SGET04

Function/Subroutine Documentation
   subroutine sget04 (integer n, integer nrhs, real, dimension( ldx, * ) x,
       integer ldx, real, dimension( ldxact, * ) xact, integer ldxact, real
       rcond, real resid)
       SGET04

       Purpose:


            SGET04 computes the difference between a computed solution and the
            true solution to a system of linear equations.

            RESID =  ( norm(X-XACT) * RCOND ) / ( norm(XACT) * EPS ),
            where RCOND is the reciprocal of the condition number and EPS is the
            machine epsilon.

       Parameters
           N

                     N is INTEGER
                     The number of rows of the matrices X and XACT.  N >= 0.

           NRHS

                     NRHS is INTEGER
                     The number of columns of the matrices X and XACT.  NRHS >= 0.

           X

                     X is REAL array, dimension (LDX,NRHS)
                     The computed solution vectors.  Each vector is stored as a
                     column of the matrix X.

           LDX

                     LDX is INTEGER
                     The leading dimension of the array X.  LDX >= max(1,N).

           XACT

                     XACT is REAL array, dimension( LDX, NRHS )
                     The exact solution vectors.  Each vector is stored as a
                     column of the matrix XACT.

           LDXACT

                     LDXACT is INTEGER
                     The leading dimension of the array XACT.  LDXACT >= max(1,N).

           RCOND

                     RCOND is REAL
                     The reciprocal of the condition number of the coefficient
                     matrix in the system of equations.

           RESID

                     RESID is REAL
                     The maximum over the NRHS solution vectors of
                     ( norm(X-XACT) * RCOND ) / ( norm(XACT) * EPS )

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Definition at line 101 of file sget04.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

LAPACK                          Version 3.12.0         TESTING/LIN/sget04.f(3)