Hi,

for me it's unclear how you specify your data and your model. in general -
it seems that you're using user-made polynomial terms? or have you used the
poly() function to form them? I'm asking because you don't have most of the
lower-order terms in your output. as for the interaction - it's
interpretation is fairly straightforward. E.g. interaction of time4:A1:B1
contains the fourth order coefficient of regression for your relationship
in the objects from both A1 and B1 groups. The lack of 0/1 next to B in the
second example may be caused by accidental conversion of B into numerical
(rather than factor) variable - in such a situation it would be treated as
continous variable and just a single regression coefficient would be
returned.

cheers,
sz.

-- 
Szymon Drobniak || Population Ecology Group
Institute of Environmental Sciences, Jagiellonian University
ul. Gronostajowa 7, 30-387 Kraków, POLAND
tel.: +48 12 664 51 79 fax: +48 12 664 69 12

www.eko.uj.edu.pl/drobniak

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