Can one use polygon() or equivalent in lattice and ggplot2 plots?

Posted by Alex Reynolds on Stack Overflow See other posts from Stack Overflow or by Alex Reynolds
Published on 2011-11-29T01:03:35Z Indexed on 2011/11/29 1:50 UTC
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lattice

Is it possible to annotate lattice (or ggplot2) figures with elements created with polygon() (or elements created with a similar function) from the graphics library?

I'm not too familiar with either library beyond examples of simple graphs posted on the web and printed in Deepayan Sarkar's book. Therefore, while I have code for what I've been doing in R with the graphics library, pointing me to relevant, equivalent functions and usage examples for lattice or ggplot2 specifically would be appreciated. Thanks.

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