[R] Adjusting the x axis range in effects plots

[S Ellison]

> I am having some difficulties with effects plots from the effects package. 
Your problem is probably not xlim, which the effects plots should accept; it's more likely that you're trying to use base graphics to add symbols to a lattice plot - effects uses lattice, not base graphics. The coordinate systems don't mix. 

Try googling 'adding points to lattice plots' or similar - but be prepared for some intricate answers.

Steve E



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