Heeeeeelp! Estimatet Marginal Means of ANOVA needed!

Hello!

I urgently need to know if it is possible (and if so, how to do) to get 
the "Estimatet marginal means" from an ANOVA.
Or explained more coplicated: It's about plants sewn in 2 densities & 2 
patterns. The Variable is biomass and I also use a Covariate. There are highly 
significant differences between density & pattern but I don't know which of the 
2 densities gives the higher biomass values.
I would like to get something analoge to the "Estimatet Marginal Means" you get 
with SPSS.
Who can help me as soon as possible?

Thanks
Deborah Renz


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