[R] Plotting nls

From: Lanre Okusanya <ooo_at_buffalo.edu>
Date: Fri 26 Aug 2005 - 09:50:34 EST

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@buffalo.edu
Tel: (716)645-2828 x 275
Fax: (716)645-2886



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