now I feel very silly! I swear I was trying this for a long time and it
didn't work. Now that I closed R and restarted it it works also on my
machine.
So is the only problem that my model is overparametrized with the data I
have? however shouldn't it be possible to fit an nls to these data?
thanks for the help
Am 27.09.2012 21:27, schrieb Berend Hasselman:
y_val<-115-118*exp(-0.12*(seq(1,100)+rnorm(100,0,0.8)))
>x_val<-seq(1:100)
>plot(y_val~x_val)
>summary(mod1<-nls(y_val~a-b*exp(-c*x_val),start=list(a=115,b=118,c=0.12)))
>
--
Benedikt Gehr
Ph.D. Student
Institute of Evolutionary Biology and Environmental Studies
University of Zurich
Winterthurerstrasse 190
CH-8057 Zurich
Office 13 J 36b
Phone: +41 (0)44 635 49 72
http://www.ieu.uzh.ch/staff/phd/gehr.html
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