TESTING/LIN/cget04.f(3)

NAME
TESTING/LIN/cget04.f

SYNOPSIS

  Functions/Subroutines
subroutine cget04 (n, nrhs, x, ldx, xact, ldxact, rcond, resid)
CGET04

Function/Subroutine Documentation

  subroutine cget04 (integer n, integer nrhs, complex, dimension( ldx, * ) x, integer ldx, complex, dimension( ldxact, * ) xact, integer ldxact, real rcond, real resid)

CGET04

Purpose:

     CGET04 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 COMPLEX 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 COMPLEX 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 cget04.f.

Author

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