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I am using R 2.7.0 on a linux platform. I am trying to reproduce a 2002 example using lme from the nlme library. I want to change the otimizer from the default (nlminb) to optim. Specifically, this is what I am trying to do: R> library(nlme) R> library(car) # for data only R> data(Blackmoor) # from car R> Blackmoor$log.exercise <- log(Blackmoor$exercise + 5/60, 2) R> attach(Blackmoor) R> lme(log.exercise ~ I(age - 8)*group, + random = ~ I(age - 8) | subject, + correlation = corCAR1(form = ~ age-8|subject), + d...

...ool/samba printable = Yes browseable = No [media] comment = media on annwn.mortshire path = /var/media read only = No I have double and triple checked everything I can think of, and I am stumped. Does anyone have a clue they'd be willing to share? -- bblackmoor@blackgate.net 2007-04-05