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Re: Any 1D functional minimization routines out there? [message #3875 is a reply to message #3869] Tue, 04 April 1995 00:00 Go to previous messageGo to previous message
daft is currently offline  daft
Messages: 5
Registered: February 1991
Junior Member
dan> You might try FX_ROOT. It uses Muellers method.
dan> Dan (I speak for no organization) O'Connell


Hi Dan,

Thanks for your post. I checked out Muller's method in the IDL docs
and I understand what it does. I wonder if you, or someone else more
versed in numerical analysis than I, could comment on this:

Obviously, I can minimize my function by forming its derivative and
root finding. But my function is not analytic and I am not keen on
doing numerical differencing (because this is ill-conditioned, I
imagine). Is there a deeper link between root finding and
minimization which I am missing?

If not, I guess I'll translate some C routines into IDL (I can't
CALL_EXTERNAL, for another unrelated reason). But this will be slooow
(loops) unless I spend a long time on it.

--
Chris M.W. Daft <daft@crd.ge.com>
KWC-1336, GE CR&D 518-387-6615
P.O. Box 8 518-387-7512 (fax)
Schenectady, N.Y. 12301-0008

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