NonlinearFit

*To*: mathgroup at smc.vnet.net*Subject*: [mg49846] NonlinearFit*From*: Andrew_Pollock at rcomext.com*Date*: Wed, 4 Aug 2004 10:46:23 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

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

**Follow-Ups**:**Re: NonlinearFit***From:*Yasvir Tesiram <yat@omrf.ouhsc.edu>