On Mon, Mar 31, 2008 at 5:38 PM, Jonathan Stickel <[EMAIL PROTECTED]> wrote: > Firstly, I would like to ask about the spline-gcvspl package, which > provides a nice way to smooth data. What is the origin of the non-free > license? I looked at the source link for the fortran dependency and > performed a google search, but I cannot find the posted license > anywhere. Does the non-free license (dated 1986) still apply? Other > references on the web, including a Matlab mex interface, seem to imply > that this code is public domain, or at least provide no > copyright/license information at all. > > Secondly, I have written a set of functions that implements data > smoothing by Tikhonov regularization. For most cases it performs at > least as well as the gcvspl method, especially when looking at > derivatives of the data. The code will be under the GPL and is written > completely in m-files. My question is: should I put the functions in > an existing octave-forge package or create a new one? They shouldn't go > in splines since a spline method isn't used. How about a > "data-smoothing" package or perhaps a "regularization" package? >
Is this a kernel-based smoothing method? If so, you may also check my recently-created OctGPR package in main/ that is dedicated to regression & smoothing of multidimensional data. It currently implements the Gaussian Process Regression (kernel smoothing) with kernel width estimation via trust-region. I'm also planning to add RBF regression using GCV or BIC with the same optimization method in the near future (currently in progress). The package is targeted to medium-scale mildly multidimensional (say, up to a few thousand points in up to 10-15 dimensions). In any case, a little duplicate work is normal for Open Source :) -- RNDr. Jaroslav Hajek computing expert Aeronautical Research and Test Institute (VZLU) Prague, Czech Republic url: www.highegg.matfyz.cz ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Octave-dev mailing list Octave-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/octave-dev
