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Re: A heartfelt thank you for MPFIT [message #60242] Sat, 10 May 2008 10:28
David Fanning is currently offline  David Fanning
Messages: 11724
Registered: August 2001
Senior Member
Gernot Hassenpflug writes:

> I would be happy to write a little article if others would benefit,
> but what do you refer to exactly with "how it is done?"

I refer, of course, to the fact that the mathematically
challenged among us need a little more, uh, explicit
help to go from conception to finished product. Something
like: This is what I wanted to do, this is how I tried it
first and failed, this is what I did to fix things, and
this is how I triumphed in the end, sort of thing, with
plenty of IDL code to show the way.

If you want me to host it, you might find it helpful
to use the HTML template you can find here:

http://www.dfanning.com/template.html

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
Re: A heartfelt thank you for MPFIT [message #60243 is a reply to message #60242] Sat, 10 May 2008 09:07 Go to previous message
Gernot Hassenpflug is currently offline  Gernot Hassenpflug
Messages: 18
Registered: April 2001
Junior Member
Craig Markwardt <craigmnet@REMOVEcow.physics.wisc.edu> writes:

> Gernot Hassenpflug <gernot@nict.go.jp> writes:
>
>> I'd like to extend my sincerest thanks to Craig Markwardt for MPFIT
>> and its related programs, which allowed me to fit second-order
> ...
>>
>> Many thanks once again,
>>
>> Gernot Hassenpflug
>
> Dear Gernot, you're welcome! A lot of thanks also goes to the
> original authors of MINPACK who developed the algorithms.
>
> To the rest of the community, just so you know, the system hosting my
> website was destroyed by hackers. The site has been restored from
> backup, but it is hosted differently now, and I won't be able to
> change things as easily.

Oh dear, that is terrible! I noticed that the latest modifications
were 29 March 2008 or something like that, but had no idea that there
were any problems.

Best regards,
Gernot

--
Gernot Hassenpflug
Re: A heartfelt thank you for MPFIT [message #60244 is a reply to message #60243] Sat, 10 May 2008 09:07 Go to previous message
Gernot Hassenpflug is currently offline  Gernot Hassenpflug
Messages: 18
Registered: April 2001
Junior Member
David Fanning <news@dfanning.com> writes:

> Gernot Hassenpflug writes:
>
>> I spent literally months trying to find out how best to do such
>> covariance matrix calculations for fitted parameters (also on
>> calculating the input covariances) with various commercial programs,
>> since I did not trust myself to use the available open software
>> without first checking on 'proven' software: Matlab does not have such
>> a function (I did not trust my coding from scratch based on Numerical
>> Recipes), nor does Mathematica (unless you buy the extra Statistics
>> toolbox), and with Maple it is a royal pain to get the parameters out
>> of the structure they are in---but excellent for cross-checking.
>
> Why don't you write a little article for us on how
> you did this so we can all share in the knowledge
> of how it is done? I'll give you a space for it if
> you don't have your own.

Dear David,

I would be happy to write a little article if others would benefit,
but what do you refer to exactly with "how it is done?"

As for space, I assume you are referring here to website space, not
merely a post to the newsgroup which will be archived? In any case, I
am happy to write an article, and as my own website is a non-permanent
dynamic DNS experimental site, I would accept with gratitude your
offer of space.

Best regards,
Gernot

--
Gernot Hassenpflug
Re: A heartfelt thank you for MPFIT [message #60260 is a reply to message #60244] Fri, 09 May 2008 07:23 Go to previous message
Craig Markwardt is currently offline  Craig Markwardt
Messages: 1869
Registered: November 1996
Senior Member
Gernot Hassenpflug <gernot@nict.go.jp> writes:

> I'd like to extend my sincerest thanks to Craig Markwardt for MPFIT
> and its related programs, which allowed me to fit second-order
...
>
> Many thanks once again,
>
> Gernot Hassenpflug

Dear Gernot, you're welcome! A lot of thanks also goes to the
original authors of MINPACK who developed the algorithms.

To the rest of the community, just so you know, the system hosting my
website was destroyed by hackers. The site has been restored from
backup, but it is hosted differently now, and I won't be able to
change things as easily.

Yours,
Craig


--
------------------------------------------------------------ --------------
Craig B. Markwardt, Ph.D. EMAIL: craigmnet@REMOVEcow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
------------------------------------------------------------ --------------
Re: A heartfelt thank you for MPFIT [message #60264 is a reply to message #60260] Fri, 09 May 2008 05:38 Go to previous message
David Fanning is currently offline  David Fanning
Messages: 11724
Registered: August 2001
Senior Member
Gernot Hassenpflug writes:

> I spent literally months trying to find out how best to do such
> covariance matrix calculations for fitted parameters (also on
> calculating the input covariances) with various commercial programs,
> since I did not trust myself to use the available open software
> without first checking on 'proven' software: Matlab does not have such
> a function (I did not trust my coding from scratch based on Numerical
> Recipes), nor does Mathematica (unless you buy the extra Statistics
> toolbox), and with Maple it is a royal pain to get the parameters out
> of the structure they are in---but excellent for cross-checking.

Why don't you write a little article for us on how
you did this so we can all share in the knowledge
of how it is done? I'll give you a space for it if
you don't have your own.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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