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labdata
2004 Aug 19
0
nlme R vs S plus
...way to solve this problem?
The code I am using is below:
W3<-deriv(~A*ti^exp(logB)*exp(-exp(logC)*ti),c("A","logB","logC"),
function(ti,A,logB,logC){})
Lact.nlme<-{nlme(model=MLKYLD~W3(DIM,A,logB,logC),
fixed=A+logB+logC~1,
random=A+logB+logC~1|ID,
data=LacData.x0, start=c(13.41143,log(0.152792),log(0.002494)), control=nlmeControl(msMaxIter=200),
verbose=T)
}
Any help or advice would be greatly appreciated,
Evelyn
--
Evelyn Hall
PhD Student
Faculty of Veterinary Science
C01 JL Shute Building Camden
University of Sydney