Please help getting the R squared value in asymptotic regression model

I use the code below


model1<-nls(GN1~SSasymp (nrate,a,b,c), data = data.1 )


and R produced the modell coefficients without the R squared value?


-- 
Ahmed M. Attia


Research Assistant
Dept. Of Soil&Crop Sciences
Texas A&M University
ahmed <ahmedatia@zu.edu.eg>.attia@ag.tamu.edu
Cell phone: 001-979-248-5215

	[[alternative HTML version deleted]]


