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Given the recent discussion on data smoothing and numerical
differentiation, It is a good time to announce that I have uploaded a
Macintosh PowerPC program on our gopher server called QuickSAND, for Quick
Smoothing And Numerical Differentiation. The program has both a (1)
slightly less flexible version of Woltring's GCVSPL package (cubic, quintic
and heptic spline smoothing and differentiation) and (2) two Fourier
methods that use an optimal Wiener filter (hopefully, the optimally
regularized fourier method will be implemented soon). The program is
completely menu driven and very simple to use.
The program and a readme file can be downloaded from my web page at
http://jaw.fmnh.org/ND.html
The program is freeware.
Cheers,
Jeff Walker
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Jeff Walker
Dept. of Zoology
Field Museum of Natural History
Roosevelt Rd. at Lake Shore Dr.
Chicago, IL 60605, USA
phone: 312-922-9410 x537 fax: 312-427-7269
email: walker@fmppr.fmnh.org
web: http://jaw.fmnh.org/Home.html
"I like practical applications in mathematics, rather than speculating
about the first ten to the minus something seconds of the universe.
Cosmology seems to be almost too close to theology to be interesting.
To me, it is not quite science, but more like creation myth."
- Sir James Lighthill
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differentiation, It is a good time to announce that I have uploaded a
Macintosh PowerPC program on our gopher server called QuickSAND, for Quick
Smoothing And Numerical Differentiation. The program has both a (1)
slightly less flexible version of Woltring's GCVSPL package (cubic, quintic
and heptic spline smoothing and differentiation) and (2) two Fourier
methods that use an optimal Wiener filter (hopefully, the optimally
regularized fourier method will be implemented soon). The program is
completely menu driven and very simple to use.
The program and a readme file can be downloaded from my web page at
http://jaw.fmnh.org/ND.html
The program is freeware.
Cheers,
Jeff Walker
-------------
Jeff Walker
Dept. of Zoology
Field Museum of Natural History
Roosevelt Rd. at Lake Shore Dr.
Chicago, IL 60605, USA
phone: 312-922-9410 x537 fax: 312-427-7269
email: walker@fmppr.fmnh.org
web: http://jaw.fmnh.org/Home.html
"I like practical applications in mathematics, rather than speculating
about the first ten to the minus something seconds of the universe.
Cosmology seems to be almost too close to theology to be interesting.
To me, it is not quite science, but more like creation myth."
- Sir James Lighthill
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