Since I'm associated with a lot of nonlinear modeling software, including nlsr
and (now
deprecated) nlmrt, I'll perhaps seem an odd person to say that I calculate an
R^2 quite
regularly for all sorts of models. I find it useful to know if my nonlinear
models do
poorly compared to the model that
Please note that R^2 for nonlinear models is nonsense.
Search on "R^2 in nonlinear models" for details, e.g.
http://statisticsbyjim.com/regression/r-squared-invalid-nonlinear-regression/
Cheers,
Bert
Bert Gunter
"The trouble with having an open mind is that people keep coming along and
Thanks Ellison, I will try it.
Francis
-Original Message-
From: S Ellison
Sent: Thursday, August 9, 2018 8:12 AM
To: Francis Boateng ; r-help@r-project.org
Subject: RE: exponential day
> Please, how can I determine parameters from exponential equation
> Example
> one: y =
> Please, how can I determine parameters from exponential equation Example
> one: y = a*exp(-b*x); how do I determine a and b , as well as R-square
> from data sets. And also fitting y = a*exp(-b*x) into the data sets Assuming
> data sets A = (0,2,4,6,8,10) B = (1,0.8,0.6,0.4,0.2,0.1)
For
Hi,
Please, how can I determine parameters from exponential equation
Example one: y = a*exp(-b*x); how do I determine �a� and �b�, as well as
R-square from data sets. And also fitting y = a*exp(-b*x) into the data sets
Assuming data sets
A = (0,2,4,6,8,10)
B = (1,0.8,0.6,0.4,0.2,0.1)
Thanks
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