Well, here goes...
I still wish there were a really good monograph on the use and
implementation of factors.
I had to do a certain amount of digging to learn that {assign, get,
eval, expression, call, parse, deparse} all existed and how they play
together. Sometimes they are look like the C language's indirect
addressing, *foo and &foo , and sometimes they don't. :-)
Remembering exactly what " y~x " can do and what it can't took a while.
Learning about, and watching for 'lazy evaluation,' especially in
variables passed to a function, was a bit of a surprise.
And to echo others, "R-inferno" has been invaluable, along with the
Zoonek manual.
Carl
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