| Re: Curvefit on PV-Wave [message #20298] |
Fri, 02 June 2000 00:00 |
rkj
Messages: 66
Registered: February 1996
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Member |
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: "R. Kyle Justice" wrote:
: >
: > Does anyone have a *PV-Wave* routine that will perform a non-linear
: > least squares fit? Apparently I am not the only one unhappy with
: > the standard CURVEFIT function
: Do have the IMSL Math/Stats option for PV-WAVE? If so,
: then a good option for non-linear fitting is the
: NLINSQ function, which solves a nonlinear least-squares
: problem using a modified Levenberg-Marquardt algorithm.
: Hope this helps,
: M. Williams
: Resource Engineering, Inc.
My Math toolkit has been lying around dormat for some time so I forgot
to look there. Thanks! It works perfectly.
Kyle
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| Re: Curvefit on PV-Wave [message #20308 is a reply to message #20298] |
Thu, 01 June 2000 00:00  |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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R. Kyle Justice (rkj@dukebar.crml.uab.edu) writes:
> David, I thought tennis was your forte ;-) As an avid hoopster myself,
> all I can say is that the apparent "slam-dunk" hit back-iron and
> rebounded all the way back to mid-court. You should be familiar with
> this since you are presumably a Nuggets fan :-P
Indeed, tennis is my game. And now that the subject of the Nuggets
has been brought up I'm giving up basketball entirely. :-(
Cheers,
David
P.S. Let's just say I'm the only non-seeded player left in the
quarter finals of 4.0 draw of the big Memorial Day tournament. We're
about to find out if I'm playing as good as I think I am playing
in about two hours when I play the No. 2 seed. :-(
I did knock of some hot-shot youngster from the University
in a three-setter when I used smarts instead of power. Maybe
there *is* something to be said for getting older. :-)
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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| Re: Curvefit on PV-Wave [message #20309 is a reply to message #20308] |
Thu, 01 June 2000 00:00 |
rkj
Messages: 66
Registered: February 1996
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Member |
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David Fanning (davidf@dfanning.com) wrote:
: R. Kyle Justice (rkj@dukebar.crml.uab.edu) writes:
: > Does anyone have a *PV-Wave* routine that will perform a non-linear
: > least squares fit? Apparently I am not the only one unhappy with
: > the standard CURVEFIT function; I have seen a number of IDL routines
: > that would probably give the desired results.
: >
: > Maybe I should port these to PV-Wave? This appears to be somewhat
: > involved however.
: This is a totally uninformed opinion, of course, but
: I should have thought the porting would be a slam-dunk.
David, I thought tennis was your forte ;-) As an avid hoopster myself,
all I can say is that the apparent "slam-dunk" hit back-iron and
rebounded all the way back to mid-court. You should be familiar with
this since you are presumably a Nuggets fan :-P
: Cheers,
: David
Kyle
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| Re: Curvefit on PV-Wave [message #20312 is a reply to message #20308] |
Thu, 01 June 2000 00:00 |
Mark D. Williams
Messages: 15
Registered: November 1999
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Junior Member |
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Hi Kyle,
"R. Kyle Justice" wrote:
>
> Does anyone have a *PV-Wave* routine that will perform a non-linear
> least squares fit? Apparently I am not the only one unhappy with
> the standard CURVEFIT function
Do have the IMSL Math/Stats option for PV-WAVE? If so,
then a good option for non-linear fitting is the
NLINSQ function, which solves a nonlinear least-squares
problem using a modified Levenberg-Marquardt algorithm.
Hope this helps,
M. Williams
Resource Engineering, Inc.
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