Deepayan Sarkar
Some Notes on lattice
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Trellis Graphics is implemented in S-PLUS using the traditional S
graphics engine.  In contrast, lattice, the implementation of
Trellis Graphics in R, uses grid graphics as the underlying mechanism.
Being an independent implementation, lattice differs from the
original in several other aspects as well. Most of the literature
available on Trellis Graphics describes the implementation in S-PLUS.
This paper attempts to supplement that material by giving an overview
of the major differences between the two.

In section 2 we discuss the benefits of using grid and provide some
examples illustrating its usefulness. In section 3 we discuss some
differences between the Trellis and lattice user level API's. An
elementary knowledge of Trellis Graphics is assumed.