[R] "lme" in R and Splus-7

[Dieter Menne]

yyan liu <zhliur <at> yahoo.com> writes:

>   I used the function "lme" in R and Splus-7. With the same dataset and same
argument for the function, I got
> quite different estimation results from these two software. Anyone has this
experience before?

>From the FAQ:

R by default uses treatment contrasts in the unordered case, whereas S uses the
Helmert ones. This is a deliberate difference reflecting the opinion that
treatment contrasts are more natural.

Dietr