newton1.h

数值分析中实现对给定数表进行插值、曲面拟合、逼近

#ifndef __Newton1_H_INCLUDE__
#define __Newton1_H_INCLUDE__
#include <stdio.h>
#include <iostream.h>
#include <malloc.h>
#include <math.h>

typedef struct  
{
	double a1;
	double a2;
	double a3;
}POINT;	//定义节点结构

//初始化f(t,u)
void IniTabFtu(POINT ftu[6][6]);
//计算关于t,u,v,w的方程组的每个函数-fi的值
void Function(double f[4], double q[4], double x, double y);
//求Jacobi矩阵
void Jacobi(double **J,double q[4]);
//对矩阵A作选主元的LU分解操作
void LU(double **a, int *m, int n);
//用Doolittle分解法求解线性方程组
void Doolittle(double **a,double *b,int *M,double *x,int m);
//求向量的无穷范数
double InfiFS(double x[4]);
//用Newton法解非线性方程组
void Newton1(double q[4],double x,double y);

#endif