lmer / lme [General Sta­tis­tics]

posted by Helmut Homepage – Vienna, Austria, 2019-12-25 20:12 (2376 d 07:08 ago) – Posting: # 21030
Views: 13,181

Hi Nastia,

❝ I still struggle to understand what is the difference between lmer and lme in this case...


The syntax of the formula for random effects is different.

mod <- lmer(logPK  ~ sequence + period + treatment +
                     (1|subject),
                     data = data)
mod <- lme(log(PK) ~ sequence + period + treatment,
                     random = ~1|subject,
                     data = data, na.action = na.omit)

Important: If you have incomplete data, in lme() you have to use na.action = na.omit because the default na.action = na.fail would stop and throw an error.

The method to extract the PE and calculate the CI is also different. Hint: Lines 53–56 and 80–84 of the source-code of method.B.R.

Dif-tor heh smusma 🖖🏼 Довге життя Україна! [image]
Helmut Schütz
[image]

The quality of responses received is directly proportional to the quality of the question asked. 🚮
Science Quotes

Complete thread:

UA Flag
Activity
 Admin contact
23,655 posts in 4,993 threads, 1,572 registered users;
367 visitors (0 registered, 367 guests [including 28 identified bots]).
Forum time: 04:20 CEST (Europe/Vienna)

The real struggle is not between the right and the left
but between the party of the thoughtful
and the party of the jerks.    Jimmy Wales

The Bioequivalence and Bioavailability Forum is hosted by
BEBAC Ing. Helmut Schütz
HTML5