Hello all,

 

I've been struggeling quite a lot in trying to perform the TukeyHSD
test, but in the end I continuously run into this error message:
 
"'model.tables' is not implemented for multiple responses"
 
I just cannot understand what this error message exactly implies (what
causes it). By using both the "lm" and "aov" functions, it is
straightforward to calculate Anova p-values (F-test values) for a 6
groups problem (so the hybridized arrays contains replicates of samples
with 6 treatments). Performing a TukeyHSD test seems to me a logical
thing to do, because I want to find out which treatment(s) is (are) the
significant one(s).
 
But this seems to be impossible; perhaps due to my lack of expertise on
this specific statistical issue? Can someone please help me out? Note
that the 'simint' and 'simtest' commands also fail (some vague error
message saying that 2 vectors are not of equal length?)... Furthermore,
the calculated F-test values have been checked in ArrayAssist and these
values are identical.
 
Regards,
 
Dr. Philip de Groot
Wageningen University
 

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