KmlIssGcrSolve?I

Solve a system of linear equations.

Interface Definition

C interface:

int KmlIssGcrSolveSI(KmlSolverTask **handle, int nb, float *x, int ldx, const float *b, int ldb);

int KmlIssGcrSolveDI(KmlSolverTask **handle, int nb, double *x, int ldx, const double *b, int ldb);

Parameters

Parameter	Type	Description	Input/Output
handle	KmlSolverTask **	Solver handle, which is a variable transferred previously	Input/Output
nb	int	Number of right-hand side vectors. The value of nb can only be 1.	Input
x	float * in KmlIssGcrSolveSI double * in KmlIssGcrSolveDI	Dense vector that stores the solution result. The quantity of elements is ldxnb, and the ith element location of the kth vector is x[i + k * ldx]*.	Output
ldx	int	Leading dimension of x. ldx ≥ max(1, n).	Input
b	float * in KmlIssGcrSolveSI double * in KmlIssGcrSolveDI	Dense vector that stores right-hand sides. The quantity of elements is ldbnb, and the ith element location of the kth vector is b[i + k * ldb]*.	Input
ldb	int	Leading dimension of b. ldb ≥ max(1, n).	Input

Return Values

Return Value	Type	Description
NO_ERROR	int	The execution is successful.
NO_MEMORY	int	The memory is insufficient.
KML_SOLVER_INVALID_ARGUMENT	int	Invalid parameter.

Dependencies

#include "kml_iss.h"

Examples

C interface:

    KmlSolverTask *handle
    int n = 8;   
    double a[26] = {1.0, 1.0, 2.0, 9.0, 2.0, 1.0, -3.0, 2.0, 3.0, 2.0, 1.0, 1.0, 9.0, -5.0, 2.0, 6.0, 1.0, -3.0, 1.0, 4.0, 1.0, -5.0, 7.0, 2.0,\
                     1.0, 2.0};
    int ja[26] = {0, 3, 4, 1, 2, 3, 5, 1, 2, 7, 0, 1, 3, 6, 0, 4, 5, 1, 4, 5, 7, 3, 6, 2, 5, 7};
    int ia[9] = {0, 3, 7, 10, 14, 17, 21, 23, 26};
    int nb = 1;
    double x[8]
    int ldx = n;
    double b[8] = {4.0, 9.0, 7.0, 6.0, 9.0, 3.0, 2.0, 5.0};
    int ldb = n;
    int ierr;
    ierr = KmlIssGcrInitDI(&handle, n, a, ja, ia);
    ierr = KmlIssGcrAnalyzeDI(&handle);
    ierr = KmlIssGcrFactorizeDI(&handle);
    ierr = KmlIssGcrSolveDI(&handle, nb, x, ldx, b, ldb);

Parent topic: GCR