KmlDssSymSet?I(D/S)

Set handle-related real-number values.

Interface Definition

C interface:

int KmlDssSymSetSIS(KmlSolverTask **pHandle, enum KmlSolverParam param, float *value, int nvalue);

int KmlDssSymSetDID(KmlSolverTask **pHandle, enum KmlSolverParam param, double *value, int nvalue);

int KmlDssSymSetCIS(KmlSolverTask **pHandle, enum KmlSolverParam param, float *value, int nvalue);

int KmlDssSymSetZID(KmlSolverTask **pHandle, enum KmlSolverParam param, double *value, int nvalue);

Parameters

Parameter	Type	Description	Input/Output
pHandle	KmlSolverTask **	Solver handle. pHandle cannot be a null pointer.	Input
param	enum KmlSolverParam	KMLSS_REFINEMENT_TOLERANCE_LEVEL indicates the threshold set for the iterative refinement algorithm. KMLSS_PIVOTING_THRESHOLD indicates the threshold set by the iterative pivoting algorithm. Its value is the value set by the pivoting algorithm.	Input
value	double * or float *	Array containing parameters related to direct solution methods.	Input
nvalue	int	Number of elements in the value array.	Input

Return Value

Return Value	Type	Description
KMLSS_NO_ERROR	int	The execution is successful.
KMLSS_BAD_SELECTOR	int	The input value of KML_SOLVER_PARAM is not supported currently or does not exist during the solving process.

Dependencies

#include "kml_dss.h" or #include "kml_solver.h"

Examples

C interface:

int n = 8;
int ia[9] = {0, 2, 4, 6, 7, 8, 9, 10, 11};
int ja[11] = {0, 7, 1, 6, 2, 5, 3, 4, 5, 6, 7};
double a[11] = {1.0, 2.0, -2.0, 3.0, 3.0, 4.0, -4.0, 5.0, -6.0, 7.0, 8.0};

double b[8] = {3.0, 1.0, 7.0, -4.0, 5.0, -2.0, 10.0, 10.0};
double x[8];
int nrhs = 1;
int ldx = n, ldb = n;

KmlSolverTask *handle;
int ierr = KmlDssSymInitDI(&handle, n, a, ja, ia);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymInitDI: %d", ierr);
}
ierr = KmlDssSymAnalyzeDI(&handle);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymAnalyzeDI: %d", ierr);
}
ierr = KmlDssSymFactorizeDI(&handle);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymFactorizeDI: %d", ierr);
}

double tolerance = 1.e-12;
ierr = KmlDssSymSetDID(&handle, KMLSS_REFINEMENT_TOLERANCE_LEVEL, &tolerance, 1);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymSetDID: %d", ierr);
}
int nsteps = 2;
ierr = KmlDssSymSetDII(&handle, KMLSS_REFINEMENT_MAX_STEPS, &nsteps, 1);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymSetDII: %d", ierr);
}

ierr = KmlDssSymSolveDI(&handle, nrhs, x, ldx, b, ldb);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymSolveDI: %d", ierr);
}

int nstep;
ierr = KmlDssSymGetDII(&handle, KMLSS_REFINEMENT_STEPS, &nstep, 1);
printf("REFINEMENT_STEP = %d\n", nstep);
double res;
ierr = KmlDssSymGetDID(&handle, KMLSS_REFINEMENT_RESIDUAL, &res, 1);
printf("REFINEMENT_RESIDUAL = %f\n", res);

Output:

REFINEMENT_STEP = 1
REFINEMENT_RESIDUAL = 0.000000

Parent topic: LDLT (DEPRECATED)