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Subject: Re: Curve Fitting Toolbox
Date: Thu, 1 Oct 2009 16:35:20 +0000 (UTC)
Organization: Fluide Automatiques et Syst&#232;mes Thermiques
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Although I usually do a simple linear fit of log(y) for fitting exponentials,
you can also have a look to the Ezyfit toolbox,
http://www.mathworks.com/matlabcentral/fileexchange/10176
which has a demonstration page where such fit is illustrated, see:
http://www.mathworks.com/matlabcentral/fx_files/10176/3/content/ezyfit/demo/html/efdemo.html
F.


"Katjes " <katja_puder@yahoo.de> wrote in message <ha1eqm$agl$1@fred.mathworks.com>...
> Hay, 
> 
> I am a newcomer in matlab. I have an exponential equation which needs to be fitted y=a*exp(-bx) - I need a and b. I used the curve fitting toolbox but I am having troubles in setting it up. I choose custom equation and entered some initial value but it looks completely odd. Anyway, I figured out I have to adjust Fit Options for customs... but I have no idea how to play with those values (DiffMinChange, MaxMinChange, ....)! Maybe some one of you!?
> 
> I appreciate every help!
> 
> Cheers, Katja