sgst04.c File Reference

#include <math.h>
#include "slu_sdefs.h"

Include dependency graph for sgst04.c:

Functions
int	sgst04 (int n, int nrhs, float *x, int ldx, float *xact, int ldxact, float rcond, float *resid)

Detailed Description

SGST04 computes the difference between a computed solution and the true solution to a system of linear equations.

Function Documentation

sgst04()

int sgst04	(	int	n,
		int	nrhs,
		float *	x,
		int	ldx,
		float *	xact,
		int	ldxact,
		float	rcond,
		float *	resid
	)

SGST04 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

[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 )

Here is the call graph for this function: