[R] rotated figures within Sweave?

[Jeff D. Hamann]

I can't recall (or find an example of) how to rotate figures in Sweave:

<<fig=TRUE, echo=false, width=9, landscape=TRUE>>= ???
<<fig=TRUE, echo=false, width=9, rotate=true>>= ???
<<fig=TRUE, echo=false, width=9, sideways=TRUE>>= ???
<<fig=TRUE, echo=false, width=9, par=(something)>>= ???

Does anyone know how to do this?