C ++曲线拟合程序，polyfit [英] C++ curve fitting program, polyfit

问题描述

您好，



我一直试图曲线拟合平滑且稍微摆动的曲线。我已经尝试使用内置函数' polyfit '在MATLAB中对此曲线进行建模，并使用' polyval 。使用MATLAB建模和绘图是成功的:)。



我的最终目标是用C ++编写这个程序，我可以用最小二乘法建模和检索多项式系数适合。我写这个程序的部分成功，然而，与MATLAB结果相比的结果是不正确的。我假设我从MATLAB得到的结果是正确的，这对我的情况来说是一个相当不错的假设。



作为参考，我使用过这个已编写过的示例程序 http://www.nr.com/forum/showthread.php?t=1452 [ ^ ]。该程序使用Numerical Recipes中的标题进行评估。



我想知道是否有更好的方法来解决最小二乘拟合问题。 ：confused：



感谢您的时间，希望尽快得到一些建议！



BM

Hello,

I have been trying to curve fit a smooth and slightly oscillating curve. I have already tried to model this curve in MATLAB using the built in function 'polyfit' and to graph it using 'polyval'. Modeling and graphing using MATLAB was successful :) .

The ultimate goal of mine is to write this program in C++ in which I can model and retrieve polynomial coefficients using least squares fit. I was partially successful writing this program, however, the results compared to MATLAB result were not correct. I assume that the results I get from MATLAB is correct and this is a fairly good assumption for my case.

As a reference, I have used this sample program someone already has written, http://www.nr.com/forum/showthread.php?t=1452[^]. This program is evaluated using the headers from 'Numerical Recipes'.

I was wondering if there is any better way to approach the least squares fit problem. :confused:

Thank you for your time and hope to get some advise soon!

BM

推荐答案

你的意思是什么，完全符合

What does you mean, exactly with

Jungyeoul Maeng写道：

Jungyeoul Maeng wrote:

我写这个程序部分成功，但是，与MATLAB结果相比的结果不正确

I was partially successful writing this program, however, the results compared to MATLAB result were not correct

？



什么是不合格的？

：）

?

What is unsatisfactory in your fit?
:)

参见http://www.slscope.co.uk/software/polyfit/index.html [ ^ ]

这篇关于C ++曲线拟合程序，polyfit的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！