[R] Huynh-Feldt R vs SAS Bug

Bela Bauer bela_b at gmx.net
Wed May 4 14:41:09 CEST 2005


I'm using anova.mlm sphericity tests/corrections, and I'm getting 
different values than SAS. In order to be able to use these values for 
publications, I'd need to know more about the SAS bug that is mentioned 
in the Reference Manual.
- What exactly causes the different values?
- Is it just a slight difference, or can I expect significant 
differences in H-F/G-G epsilons and corrected p-Values? With the data 
sets I'm using, the SAS value for H-F epsilon is almost twice the value 
from R, and I'm wondering if there's a mistake on my side or if it is 
just caused by the SAS bug.

Thanks for any hints...


More information about the R-help mailing list