Desperate help for using the B-spline function !!!

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Panty
Panty 2014-9-21
评论： Panty 2014-9-22
Hi guys,
I have a time-series (quarterly GDP) and I would like to smoothing it (de-trend) using the B-spline function.I think i need to use cubic curves.
Do you know how??
Many thanks

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Matt J
Matt J 2014-9-21
If you have the Curve Fitting Toolbox, perhaps SPAPS will do what you need? There are also about a million spline tools on the File Exchange.
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Matt J
Matt J 2014-9-21
Well, I don't think people are going to suggest a different method until we can see how you applied that method and understand why it didn't work. Since the tool was written exactly for that purpose, it's hard to see what a better proposal would be.
Panty
Panty 2014-9-22
I found a spline fuction in the file exchange removing the noise from my time-series and geeting a smoothed line. Thank you for mentioning the file exchange option. I will accept you answer. However I would like to come back to you in case I face a problem. Many thanks Matt.

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