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  modello
  
2012 May 16
2
confidence intervals for nls or nls2 model
...el usinf nls function to these data:
> x
 [1]   1   0   0   4   3   5  12  10  12 100 100 100
> y
 [1]  1.281055090  1.563609934  0.001570796  2.291579783  0.841891853
 [6]  6.553951324 14.243274230 14.519899320 15.066473610 21.728809880
[11] 18.553054450 23.722637370
The model fitted is:
modellogis<-nls(y~SSlogis(x,a,b,c))
It runs OK. Then I calculate confidence intervals for the actual data using:
dataci<-predict(as.lm(modellogis), interval = "confidence")
BUt I don?t get smooth curves when plotting it, so I want to get other "confidence 
vectors" based on a ne...