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MathGroup Archive 2005

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Re: Clamped cubic spline

  • To: mathgroup at smc.vnet.net
  • Subject: [mg55312] Re: [mg55303] Clamped cubic spline
  • From: "Janos D. Pinter" <jdpinter at hfx.eastlink.ca>
  • Date: Sat, 19 Mar 2005 04:45:13 -0500 (EST)
  • References: <200503181035.FAA14775@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

John,

depending on the details, curve fitting can be cast as an optimization 
model. Then you can set bounds and other functional relations regarding the 
parameters of the fitted model structure (more flexibly than when using the 
built-in, local search-based fitting functions). I assume that e.g. 
NMInimize or our MathOptimizer/Pro packages could suit your purposes. Let 
me know if you are interested in some tests done using MathOptimizer/Pro.

Regards,
Janos
_________________________________________________

Janos D. Pinter, PhD, DSc
President & Research Scientist, PCS Inc.
129 Glenforest Drive, Halifax, NS, Canada B3M 1J2
Telephone: +1-(902)-443-5910
Fax: +1-(902)-431-5100; +1-(902)-443-5910
E-mail: jdpinter at hfx.eastlink.ca
Web: www.pinterconsulting.com
Software products: http://www.pinterconsulting.com/Software_Sum_Info.pdf



At 06:35 AM 3/18/2005, you wrote:

>I am making a shape by getting Mathematica to draw a smooth curve
>through a set of points.  I want to set the slope of the curve at the
>endpoints. The slope at the endpoints will either be vertical or
>horizontal.  I understand that a clamped cubic spline should be able to
>do this.  The SplineFit package doesn't have clamped cubic splines.
>There is an old MathSource package which I couldn't get to work.
>
>Any help would be appreciated.
>


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