KmlIssCgSolve?I

Solve a system of linear equations.

Interface Definition

C interface:

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

int KmlIssCgSolveDI(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 KmlIssCgSolveSI double * in KmlIssCgSolveDI	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	const float * in KmlIssCgSolveSI const double * in KmlIssCgSolveDI	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	Insufficient memory space.
KML_SOLVER_INVALID_ARGUMENT	int	Invalid parameter.

Dependencies

#include "kml_iss.h"

Examples

C interface:

    KmlSolverTask *handle
    int n = 8;   
    double a[17] = { 1.0,1.0,2.0,9.0,2.0,1.0,-3.0,3.0,2.0,9.0,-5.0,6.0,1.0,4.0,1.0,7.0,2.0 };
    int ja[17] = { 0,3,4,1,2,3,5,2,7,3,6,4,5,5,7,6,7 };
    int ia[9] = {0, 3, 7, 9, 11, 13, 15, 16, 17};
    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 = KmlIssCgInitDI(&handle, n, a, ja, ia);
    ierr = KmlIssCgAnalyzeDI(&handle);
    ierr = KmlIssCgFactorizeDI(&handle);
    ierr = KmlIssCgSolveDI(&handle, nb, x, ldx, b, ldb);

Parent topic: CG