Help fitting Exponential curves

*To*: mathgroup at smc.vnet.net*Subject*: [mg28969] Help fitting Exponential curves*From*: Todd <tcs3a at virginia.edu>*Date*: Wed, 23 May 2001 01:54:34 -0400 (EDT)*Organization*: University of Virginia*Sender*: owner-wri-mathgroup at wolfram.com

Hello, 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. Thank you, Todd

**Follow-Ups**:**Re: Help fitting Exponential curves***From:*Simon Chandler <simon_chandler@agilent.com>