Re: NonlinearFit
- To: mathgroup at smc.vnet.net
- Subject: [mg49874] Re: NonlinearFit
- From: "Curt Fischer" <crf3 at po.cwru.edu>
- Date: Thu, 5 Aug 2004 09:20:35 -0400 (EDT)
- References: <ceqtcr$jrp$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Andrew,
Can you email me the files you tried to attach to your newsgroup message?
cf
Andrew_Pollock at rcomext.com wrote:
> Hello,
>
> I was hoping someone could help me with a problem I'm having with
> NonlinearFit.
>
> I'm trying to fit an exponential function to a set of data using the
> following command:
>
> << Statistics`NonlinearFit`
> NonlinearFit[Data,theta1 Exp[theta2 x],x,{theta1,theta2}]
>
> Data is the following table, where the right column is 3*Exp[.2*x]
>
> (Embedded image moved to file: pic13984.pcx)
>
> [contact the author to get the file - moderator]
>
> NonlinearFit returns (Embedded image moved to file: pic03027.pcx),
> which is clearly not 3*Exp[.2*x].
>
> I only have this problem when trying to fit exponential functions.
> Any suggestions?
>
> Thanks,
> Andy