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Re: Exponential fit question.

  • To: mathgroup at smc.vnet.net
  • Subject: [mg28034] Re: Exponential fit question.
  • From: dennisw555 at aol.com (DennisW555)
  • Date: Wed, 28 Mar 2001 02:41:09 -0500 (EST)
  • References: <99pdg6$lft@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

>I was wondering if someone could help me with the following problem.
>
>I am trying to perform an exponential fit to the following data
>{{x,y}}
>
>data
>={{50,22},{64,62},{78,122},{93,269},{107,414},{122,507},{136,597}}
>
>Fit[data,Exp[x],x]
>
>what I get is 
>
>1.94272422061017735^-63 *E^x Which is not correct.
>
>With Excel I get 7.5*E^0.0034x which is correct.
> 
>How can I do this with Mathematica ?

Try
Exp[Fit[data/.{x_,y_}->{x,Log[y]},{1,x},x]]//Simplify

Dennis


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