I am not sure what you mean. Perhaps it has to with for example:

aov(y ~ x1 + x2)

versus:

aov(y ~ x1 * x2)

?

Try lm

I agree about using lm: by default, aov() does not give coefficient estimates.

Here is an example with lm (I is not uppercase i):

time

You may have to search for them inside the model you built using either @ or $. Hope that helps.