Include dependency graph for dgst04.c:
Functions | |
| int | dgst04 (int n, int nrhs, double *x, int ldx, double *xact, int ldxact, double rcond, double *resid) |
Detailed Description
DGST04 computes the difference between a computed solution and the true solution to a system of linear equations.
Function Documentation
◆ dgst04()
| int dgst04 | ( | int | n, |
| int | nrhs, | ||
| double * | x, | ||
| int | ldx, | ||
| double * | xact, | ||
| int | ldxact, | ||
| double | rcond, | ||
| double * | resid | ||
| ) |
DGST04 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
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[in] n The number of rows of the matrices X and XACT. N >= 0. [in] nrhs The number of columns of the matrices X and XACT. NRHS >= 0. [in] x The computed solution vectors, dimension (LDX,NRHS). Each vector is stored as a column of the matrix X. [in] ldx The leading dimension of the array X. LDX >= max(1,N). [in] xact The exact solution vectors, dimension(LDX,NRHS). Each vector is stored as a column of the matrix XACT. [in] ldxact The leading dimension of the array XACT. LDXACT >= max(1,N). [in] rcond The reciprocal of the condition number of the coefficient matrix in the system of equations. [out] resid The maximum over the NRHS solution vectors of ( norm(X-XACT) * RCOND ) / ( norm(XACT) * EPS )
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