Message-ID: <430E594A.3020602@buffalo.edu>
Date: 2005-08-25T23:50:34Z
From: Lanre Okusanya
Subject: Plotting nls
In-Reply-To: <D45546375992BF429A93F7203358F14403429579@sirius.fccc.edu>
Kindly excuse a non-statistician newbie attempting to wrestle with R.
This might be a relatively easy question, but I am trying to perform nls
regression and plot the fitted function through the data superimposed on
the raw data. from reading the R-help, Rtips et al, I am only able to do
that by extracting the parameter values manually and using it to create
the plot.
Is there an easier way to do this, (I have ~60 Plots), obtain an r^2,
and also plot the x axis in the log domain (any attempts I have tried
have screwed up).
NLS script
fit<- nls(y~-emax*x^h/(ec50^h+x^h),
data= sample, start=list(emax=4,h=2,ec50=1))
summary(fit)
Thank you all for your help
Lanre Okusanya, Pharm.D.,BCPS
UB/Pfizer Pharmacometrics Fellow
University at Buffalo School of Pharmacy and Pharmaceutical Sciences
237 Cooke Hall
Buffalo, NY 14260
Email: ooo at buffalo.edu
Tel: (716)645-2828 x 275
Fax: (716)645-2886