[R] Plotting nls

[Lanre Okusanya]

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