KmlIssGcrSet?I?
设置迭代求解的相关参数。
接口定义
C Interface:
int KmlIssGcrSetSII(KmlSolverTask **handle, enum KML_SOLVER_PARAM param, const int *data, int nd);
int KmlIssGcrSetDII(KmlSolverTask **handle, enum KML_SOLVER_PARAM param, const int *data, int nd);
int KmlIssGcrSetSIS(KmlSolverTask **handle, enum KML_SOLVER_PARAM param, const float *data, int nd);
int KmlIssGcrSetDID(KmlSolverTask **handle, enum KML_SOLVER_PARAM param, const double *data, int nd);
参数
参数名 |
类型 |
描述 |
输入/输出 |
---|---|---|---|
handle |
KmlSolverTask ** |
求解器句柄,传入之前步骤的变量。 |
输入/输出 |
param |
enum KML_SOLVER_PARAM |
|
输入 |
data |
|
迭代求解相关参数数组(如最大迭代次数)。 当前可选的计算范数:
当前可选的稀疏矩阵存储格式:
当前可选择的预条件子类型:
|
输入 |
nd |
int |
data数组大小。 |
输入 |
返回值
返回值 |
类型 |
描述 |
---|---|---|
KMLSS_NO_ERROR |
int |
正常执行。 |
KMLSS_DATA_SIZE |
int |
参数nd不等于1。 |
KMLSS_NULL_ARGUMENT |
int |
{handle, data}中存在空参数。 |
KMLSS_BAD_SELECTOR |
int |
param为无效参数。 |
依赖
#include "kml_iss.h"
示例
C Interface:
KmlSolverTask *handle; int ierr; 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}; ierr = KmlIssGcrInitDI(&handle, n, a, ja, ia); int nd = 1; int idata[] = {0}; double ddata[] = {0}; double eps = 1e-4; ierr = KmlIssGcrSetDID(&handle, KMLSS_THRESHOLD, &eps, nd); if (ierr != 0) { printf("\nERROR in KmlIssGcrSetDID: %d", ierr); return 1; } int max_iters = 2000; ierr = KmlIssGcrSetDII(&handle, KMLSS_MAX_ITERATION_COUNT, &max_iters, nd); if (ierr != 0) { printf("\nERROR in KmlIssGcrSetDII: %d", ierr); return 1; }