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    發布日期: 2021-03-27
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資源簡介


在進行數值分析時，對于一個數據組應用最小二乘法進行線性擬合，是最基本也是最普遍的一種數值處理分析手段。 本文基于MFC框架，設計一種導入包含數據的txt文件，并自動使用最小二乘法進行線性擬合，計算出公式y=kx+b中的參數k和參數b，還有相關系數r，同時將數據點和擬合直線在二維坐標圖中繪制出來。 文件中包含了示例。

資源截圖

代碼片段和文件信息 

//?Analyze.cpp:?implementation?of?the?CAnalyze?class.
//
//////////////////////////////////////////////////////////////////////

#include?“stdafx.h“
#include?“LineFitting.h“
#include?“Analyze.h“

#ifdef?_DEBUG
#undef?THIS_FILE
static?char?THIS_FILE[]=__FILE__;
#define?new?DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
//?Construction/Destruction
//////////////////////////////////////////////////////////////////////

CAnalyze::CAnalyze（）
{

}

CAnalyze::~CAnalyze（）
{

}

int?CAnalyze::DoLineFitting（Vector2_double?*pvector?int?num?double?&k?double?&b?double?&r）
{
	double?mean_x=0.0;
	double?mean_y=0.0;
	double?mean_x2=0.0;
	double?mean_y2=0.0;
	double?mean_xy=0.0;
	
	if（num<=0）
		return?0;	//無數據則退出
	
	for（int?i=0;?i	{
		mean_x??+=?pvector[i].x;
		mean_y??+=?pvector[i].y;
		mean_x2?+=?pvector[i].x?*?pvector[i].x;
		mean_y2?+=?pvector[i].y?*?pvector[i].y;
		mean_xy?+=?pvector[i].x?*?pvecto

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2014-03-05?13:03??LineFitting_v2\
?????文件????????1669??2014-02-10?16:18??LineFitting_v2\Analyze.cpp
?????文件?????????823??2014-02-10?16:13??LineFitting_v2\Analyze.h
?????文件??????????53??2014-02-03?18:26??LineFitting_v2\Demo.txt
?????文件?????????157??2014-02-07?22:35??LineFitting_v2\Demo2.txt
?????文件?????????152??2014-02-07?22:47??LineFitting_v2\Demo3.txt
?????文件???????36816??2014-02-09?23:12??LineFitting_v2\LineFitting.aps
?????文件????????1721??2014-02-10?16:19??LineFitting_v2\LineFitting.clw
?????文件????????2133??2014-02-02?16:21??LineFitting_v2\LineFitting.cpp
?????文件????????4441??2014-02-10?16:19??LineFitting_v2\LineFitting.dsp
?????文件?????????547??2014-02-02?16:21??LineFitting_v2\LineFitting.dsw
?????文件????????1379??2014-02-02?16:21??LineFitting_v2\LineFitting.h
?????文件???????66560??2014-02-10?16:19??LineFitting_v2\LineFitting.ncb
?????文件???????50688??2014-02-10?16:19??LineFitting_v2\LineFitting.opt
?????文件????????1548??2014-02-10?16:18??LineFitting_v2\LineFitting.plg
?????文件????????6193??2014-02-09?23:12??LineFitting_v2\LineFitting.rc
?????文件???????17174??2014-02-10?16:19??LineFitting_v2\LineFittingDlg.cpp
?????文件????????2786??2014-02-10?16:18??LineFitting_v2\LineFittingDlg.h
?????文件????????3669??2014-02-02?16:21??LineFitting_v2\ReadMe.txt
?????文件?????????213??2014-02-02?16:21??LineFitting_v2\StdAfx.cpp
?????文件????????1091??2014-02-06?02:13??LineFitting_v2\StdAfx.h
?????文件?????????156??2014-02-04?01:22??LineFitting_v2\Struct.h
?????目錄???????????0??2014-03-05?13:03??LineFitting_v2\res\
?????文件????????1078??2014-02-02?16:21??LineFitting_v2\res\LineFitting.ico
?????文件?????????403??2014-02-02?16:21??LineFitting_v2\res\LineFitting.rc2
?????文件????????3584??2014-02-02?18:25??LineFitting_v2\res\Thumbs.db
?????文件????????1149??2014-02-04?01:37??LineFitting_v2\resource.h

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