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amoran
2006 May 17
1
nlme model specification
Hi folks,
I am tearing my hair out on this one.
I am using an example from Pinheiro and Bates.
### this works
data(Orange)
mod.lis <- nlsList(circumference ~ SSlogis(age, Asymp, xmid, scal),
data=Orange )
### This works
mod <- nlme(circumference ~ SSlogis(age, Asymp, xmid, scal),
data=Orange,
fixed = Asymp + xmid + scal ~ 1,
start =