Posted by Scott Betts on November 05, 1997 at 12:02:29:
In Reply to: Interpolation-Derivative constrained LS b-splines 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?
We have a fortran converter called F2C but I haven't
a clue if it will work on "legacy" fortran. (I'm not
all that familiar with fortran...:) If you want to try
it, it's at: