| Re: Robust curve fitting (BUG) [message #12439] |
Wed, 05 August 1998 00:00  |
Craig Markwardt
Messages: 1869
Registered: November 1996
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Senior Member |
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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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