Curve Fit Using Endpoints of the Data

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lynniz
lynniz 2011-2-3
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

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Andrew Newell
Andrew Newell 2011-2-3
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.

更多回答（2 个）

Brett Shoelson
Brett Shoelson 2011-2-4
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
lynniz
lynniz 2011-2-17
Thank you both!

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