[R] improved search site for R docs, functions, R-help

[Jonathan Baron]

Two improvements at http://finzi.psych.upenn.edu

1. I have added all packages from CRAN, including contributed
packages, so you can look for a package that does X.  Check out
the "Limit search to" box on the right, as well as "Sort by".

2. The new (beta) version of htdig (which I use) will search by
phrases as well as words (so long as the phrases are made of
words, it seems).  Thus you can search for "linear regression"
without getting everything that mentions "linear" and
"regression" somewhere.  Use quotes.

I welcome suggestions, and I would especially welcome email (to
me) from anyone familiar with hypermail and htdig, so that I can
ask for advice about how to update this page every month.  Right
now it takes 3 hours (doing it from scratch, using "rundig -a"),
and I'd like to cut that down.  (In principle I know what to do,
but I lack the confidence to try it.)

Jon Baron
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