Dear Rui,
nlme is a recommended package, lme4 is (currently) not. You need to
install it.
Best regards,
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature
and Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
To call in the statistician after the experiment is done may be no more
than asking him to perform a post-mortem examination: he may be able to
say what the experiment died of. ~ Sir Ronald Aylmer Fisher
The plural of anecdote is not data. ~ Roger Brinner
The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of
data. ~ John Tukey
2017-01-25 11:45 GMT+01:00 Rui Barradas <ruipbarradas at sapo.pt
<mailto:ruipbarradas at sapo.pt>>:
You don't need to install lme4, it comes with base R.