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Re: * looking for power fit [message #1264]

Wed, 18 August 1993 22:21

hatay
Messages: 11
Registered: June 1992

Junior Member

In article <1993Aug18.123842.15107@aragorn.unibe.ch> wiesmann@ubeclu.unibe.ch writes:
> Hi,
>
> I'm looking for a IDL-Routine that will do the
> fitting of a power function like:
>
> y = A*x^B + C
>
Would it be ok to look for something like:
log(y) = log(a) + b log(x) ?

don't ask me what happens to C and keep my 2 penny for the thought.

Ferhat F. Hatay
Dead Aerospace Engineers Society

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Re: * looking for power fit [message #1270 is a reply to message #1264]

Wed, 18 August 1993 07:13

isaacman
Messages: 20
Registered: June 1992

Junior Member

In article <1993Aug18.123842.15107@aragorn.unibe.ch>, wiesmann@ubeclu.unibe.ch writes...
> I'm looking for a IDL-Routine that will do the
> fitting of a power function like:
>
> y = A*x^B + C
>
It has perfectly well-defined partial derivatives. You can use the
CURVEFIT procedure in the User's Library.

Rich Isaacman

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