两种简单的拟合算法，曲线拟合方面的资料

两个简单的曲线拟合的方法：

 

拉格朗日插值法：

#include <stdio.h>

#include <stdlib.h>

#include <malloc.h>

 

double LAG(int,double *,double *,double);

 

void main()

{

         int n;

         double *x,*y,t,lag;

         t = 0.15;

         n = 6;

         x = (double*)calloc(n,sizeof(double));

         if(x == NULL)

         {

                   printf("内存分配失败\n");

                   exit(1);

         }

         y = (double*)calloc(n,sizeof(double));

         if(y == NULL)

         {

                   printf("内存分配失败\n");

                   exit(1);

         }

         x[0] = 0;

         x[1] = 0.1;

         x[2] = 0.195;