Hi guys ,
How do I specify random factors in R ?
If I have a factor x1 which is supposed to be random , can I try something like this ?
lm(y ~ x1, data = p)
+2
A:
Are you by chance looking for the lme4 package which is focussed on linear mixed-effects (ie. fixed versus random) modelling?
Dirk Eddelbuettel
2010-03-14 21:01:22
if I write lm(y ~ x1, data = p), x1 will be treated as a fixed factor in R , Im wondering if there is way in R to specify that x1 is a random factor
TKBell
2010-03-14 21:28:52
Yes, in the **lme4** package. Follow the link in my answer and read up on the documentation of the lme4 package. The `lm()` function is for basic linear modelling and does **not** support random effects.
Dirk Eddelbuettel
2010-03-14 22:33:50