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Re: Help fitting Exponential curves

  • To: mathgroup at smc.vnet.net
  • Subject: [mg28984] Re: [mg28969] Help fitting Exponential curves
  • From: BobHanlon at aol.com
  • Date: Thu, 24 May 2001 04:07:00 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Use the standard add-on package Statistics`NonlinearFit`

Bob Hanlon

In a message dated 2001/5/23 3:08:09 AM, tcs3a at virginia.edu writes:

>I am looking to fit some exponential curves to a form of
>   P=Po*e^(-K*t) where K and Po are values I need. The P and t I have.
>   I'm working with mathematica 4.1 and I can read the data and plot it fine
>
>but it doesn't want to give me reasonable fits.
>   So I guess my question is how would you go about getting the Fitting to
>
>work on fitting a Pre-Exponential and an exponential variable. If I type
>
>   PeakFit[x_] = Fit[Peak, Exp[-x], x]
>
>it only gives me a Pre-exponential, however if I type.
>
>   PeakFit[x_] = Fit[Log[Peak], {-x,Log[x]}, x]
>
>It just doesn't like that.  Could Someone Please point me in the right
>
>direction.
>


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