[R] How can I calculate adjusted means?

[Gustaf Granath]

Hi,
I have been looking for help about adjusted means but it seems like  
there is no specific information about it.

My problem is following:
In a 2 level ANOVA my model is -> anova(Y~treat1+treat2+covarX)
I have 4 factors in treat1 and 2 factors in treat2.

Now I want the adjusted means for my measured variable. I.e. taking  
into account the covariate variable.

How can I do that?

Regards,
Gustaf Granath, phd student