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From: Doug Schwarz <see@sig.for.address.edu>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Implementing smoothing splines
References: <gg02be$av0$1@fred.mathworks.com>
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Date: Tue, 18 Nov 2008 23:45:47 -0500
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In article <gg02be$av0$1@fred.mathworks.com>,
 "Arvind Iyer" <aiyer@ict.usc.edu> wrote:

> I need to fit smoothing splines to very noisy data.
> 
> I do not have the Spline Toolbox (whose 'spaps' function is recommended for 
> such problems.)
> 
> How can smoothing splines be implemented with other MATLAB functions? The 
> ordinary 'spline' function simply 'joins the dots' and does not perform 
> smoothing. 
> 
> What other inbuilt function can serve a similar purpose? Are there functions 
> which perform generalized regression without the need to specify a functional 
> form of regression function?


Perhaps spfit from the FEX would be useful.

<http://www.mathworks.com/matlabcentral/fileexchange/13812>


You might find a general purpose smoothing routine helpful, also.

<http://www.mathworks.com/matlabcentral/fileexchange/17986>

-- 
Doug Schwarz
dmschwarz&ieee,org
Make obvious changes to get real email address.