Question about Tukey HSD (stat package)

Alice Le Bars <alice.le-bars at nantes.inserm.fr> writes:

Dear all,

I would be glad if someone could tell me if Tukey HSD (function of
stats library) accept the NA values and could correct the unbalanced
design (different number of sample in each group)

I don't think the *theory* of the HSD allows this. There is some more
or less well-founded speculation that if the imbalance is not too bad,
then the HSD results are somewhat useful anyway, but please consider
using the multcomp package, which is specifically designed to get
these things right.

O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907