Posted by Charlie Martin on October 30, 1997 at 13:46:58:

I've come across a smoothing/interpolation technique

which uses a derivative constrained least squares

method in conjunction with cubic b-splines. Attractive

and useful features (for my application) include:

1. data can be irregularly spaced

2. both smoothing and interpolation are handled

by the technique.

3. the derivative constraint provides physically

relevant smoothing parameters which can

user specified. (One can specify the roll

off and the wavelength of the filter.)

4. Different (and reasonable) boundary constraints

can be imposed.

The code I have is very specific legacy fortran. I am

looking for public domain C or C++ code which I can

use for this application.

I'm not an expert in numerical methods, and so

perhaps the exiting packages already implement

these techniques. Is this smoothing/interpolation

method a common one, and can anyone point

me towards code that implements it?

Thanks,

Charlie

- Re: Interpolation-Derivative constrained LS b-splines
**cuma sayin***05:45:12 5/07/98*(0) - Re: Interpolation-Derivative constrained LS b-splines
**Francisco Campos Olivas***02:55:39 4/30/98*(0) - Re: Interpolation-Derivative constrained LS b-splines
**Scott Betts***12:02:29 11/05/97*(0)