多远线性回归方程C语言程序
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2013-12-18
13:55:27
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#include <malloc.h>
#include<stdio.h>
#include<stdlib.h>
#include <string.h>
#include <math.h>
#dene MAXSIZE 100
// 解线性方程。data[count*(count+1)]矩阵数组；count：方程元数；
//Gauss 消元法
void FreeData(double **dat, double *d, int count)
{
int i;
free(d);
for (i = 0; i < count; i ++)
free(dat[i]);
free(dat);
}
int LinearEquations(double *data, int count, double
*Answer)
{
int j, m, n;
double tmp, **dat, *d = data;
dat = (double**)malloc(count * sizeof(double*));
for (m = 0; m < count; m ++, d += (count + 1))
{
dat[m] = (double*)malloc((count + 1) * sizeof(double));
memcpy(dat[m], d, (count + 1) * sizeof(double));//从 d 中
复制 m+1 个字节到 dat
}
d = (double*)malloc((count + 1) * sizeof(double));
for (m = 0; m < count - 1; m ++)
{
// 行交换
for (n = m + 1; n < count && dat[m][m] == 0.0; n ++)
{
if ( dat[n][m] != 0.0)
{
memcpy(d, dat[m], (count + 1) * sizeof(double));
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