lsmeans in R

I need help with calculating lsmeans (adjusted means) of different terms in
a linear model including the main effect and the interaction effect terms. I
use lm to run the linear models...I previously noted from literature that
that "effects" package can be used to generate lsmeans. But I tried to use
it but could not figure out which option to use to get means. If anyone can
give an example of how to get lsmeans using lm object, that will very
helpful.

Thanks,
SUman

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