Re: Robust curve fitting (BUG)

[Craig Markwardt <craigmnet(at)astrog.physics.wisc.edu>]

By request, the fitting routines are now available in single packaged
archives.  Both GZIPed tar files and ZIP archives are available.  The
web page address is the same.

Another note: when I fixed the bug mentioned in a previous post, I
also added the PERROR keyword, which returns parameter errors
explicitly.  (Previously you had to compute errors yourself using the
covariance matrix).

On the whole, the MINPACK-1 routines themselves are well-tested.
However, the original MINPACK-1 routines did not permit parameter
freezing or simple bounding constraints, nor did it automatically
calculate the parameter errors.  These are my own additions; therefore
there may be a small amount of bug-ironing to get it just right.
Suggestions are welcome.

Craig

Craig Markwardt <craigmnet@astrog.physics.wisc.edu> writes:
> > >> 
> > >> I recently had an opportunity to translate the MINPACK-1 curve-fitting
> > >> package into IDL.  MINPACK is a minimization package available from
> > >> netlib, and has an excellent reputation.  I have found that it is much
> > >> more robust, able to cope with singular matrices, etc.  Since people
> > >> have been requesting, I polished it up a little bit, and am making it
> > >> available via my IDL web page:
> > >> 
> > >> http://astrog.physics.wisc.edu/~craigm/idl/idl.html
> > 

-- 
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Craig B. Markwardt, Ph.D.         EMAIL: craigmnet@astrog.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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