Displaying 1 result from an estimated 1 matches for "vonbertelanffy".
Did you mean:
vonbertalanffy
2008 Mar 24
0
Error using augPred with nlme grouped data
...;), units=list(x="(years)", y="(kg)"))
Under the grouping factor "name", this is a character column with 12 levels
(i.e. 12 animals that I have collected "mass" from over their "age.years",
both numeric columns). I create my nlsList object for the vonBertelanffy
growth curve using:
vanfemfunc<-function(age.years, A, lk, t0)
A*((1-exp(-exp(lk)*(age.years-t0)))^3)
vf.list<-nlsList(mass~vanfemfunc(age.years, A, lk, t0), data=vanfem,
start=c("A"=201.8, "lk"=-1.17, "t0"=-2.71))
and then my nlme with:
vf.nlme1<-nlme(vf.l...