comp.lang.idl-pvwave archive: archive » TNMIN from mpfit library

Home » Public Forums » archive » TNMIN from mpfit library

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: TNMIN from mpfit library [message #90256 is a reply to message #90215]

Sat, 14 February 2015 15:08

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

On Wednesday, February 11, 2015 at 2:39:50 PM UTC-5, rrya...@gmail.com wrote:
> I'm using TNMIN to minimize a very complicated function, which for reasons I cannot use MPFIT. Everything seems to be running smoothly, but after a handful of iterations it gives me
>
> status=-18
> errmsg="ERROR: Line search failed to converge"
>
> While I understand what that means, I'm not sure how to massage the inputs to TNMIN to get passed this error (or perhaps this isn't a true error but rather just another stopping condition?). Does anyone have any advice? Craig, are you out there?

TNMIN never really got the love that MPFIT got. I spent some time looking at the code (which is translated from FORTRAN that I didn't write), and I didn't get exactly why this condition would occur from a purely hypothetical standpoint.

Craig

Report message to a moderator

[Message index]

		TNMIN from mpfit library By: Russell[1] on Wed, 11 February 2015 11:39
		Re: TNMIN from mpfit library By: Russell[1] on Wed, 11 February 2015 21:01
		Re: TNMIN from mpfit library By: Craig Markwardt on Sat, 14 February 2015 15:08

Previous Topic:	mpfitfun and complex data
Next Topic:	Help - generate bell shaped function

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 15:26:40 PDT 2025

Total time taken to generate the page: 0.00441 seconds