Curve Fit Using Endpoints of the Data

Question

lynniz 2011-2-3

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/796-curve-fit-using-endpoints-of-the-data

Hi All,

Is there a curve fit function that I can use to force the fit to go through both endpoints of the data? Currently, the fit goes through the left most point but not the right most point. The reason I want to do that is I want to get some extraoplated data from the fit as well.

Thank you,

Lynniz

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Andrew Newell 2011-2-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/796-curve-fit-using-endpoints-of-the-data#answer_1158

Lynniz, forcing the curve to go through both endpoints won't improve the extrapolation. Instead, if you have the Curve Fitting Toolbox I would recommend looking at fnxtr. Also, remember that it is unwise to extrapolate very far.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Walter Roberson 2011-2-4

"Making predictions is very hard. Especially about the future."

请先登录，再进行评论。

Answer 2

Brett Shoelson 2011-2-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/796-curve-fit-using-endpoints-of-the-data#answer_1199

Note that you can also provide weights for the points you're fitting. Giving the endpoints very high weights compared to the other points might get you where you want to be.

Cheers, Brett