KmlIssGcrSolve?I
求解线性代数方程组。
接口定义
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);
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  | 
nb  | 
int  | 
右端项矢量的个数,当前nb只能为1。  | 
输入  | 
x  | 
  | 
读取并存储求解结果,其元素个数为n。  | 
输入/输出  | 
ldx  | 
int  | 
x的leading dimension大小,当前参数未使用。  | 
输入  | 
b  | 
  | 
读取右端项,其元素个数为n。  | 
输入  | 
ldb  | 
int  | 
b的leading dimension大小,当前参数未使用。  | 
输入  | 
返回值
返回值  | 
类型  | 
描述  | 
|---|---|---|
KMLSS_NO_ERROR  | 
int  | 
正常执行。  | 
KMLSS_BAD_NB  | 
int  | 
参数nb不等于1。  | 
KML_NO_MEMORY  | 
int  | 
内存不足。  | 
KMLSS_NULL_ARGUMENT  | 
int  | 
{handle, x, b}中存在空参数。  | 
依赖
#include "kml_iss.h"
示例
C Interface:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30  | 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); ierr = KmlIssGcrAnalyzeDI(&handle); ierr = KmlIssGcrFactorizeDI(&handle); int nd = 1; int idata[] = {0}; double ddata[] = {0}; double eps = 1e-4; ierr = KmlIssGcrSetDID(&handle, KMLSS_THRESHOLD, &eps, nd); int max_iters = 2000; ierr = KmlIssGcrSetDII(&handle, KMLSS_MAX_ITERATION_COUNT, &max_iters, nd); int ldx = n; int ldb = n; int nb = 1; double b[8] = {4.0, 9.0, 7.0, 6.0, 9.0, 3.0, 2.0, 5.0}; double x[8]; ierr = KmlIssGcrSolveDI(&handle, nb, x, ldx, b, ldb); if (ierr != 0) { printf("\nERROR in KmlIssGcrSolveDI: %d", ierr); return 1; }  | 
父主题: GCR