book on regular expressions

"hadley wickham" <h.wickham at gmail.com> 11/12/2007 17:02 >>>

Could someone recommend a good book on regular expressions with focus

on

applications/use as it might relate to R.  I remember there was a

mention of

such a reference book recently, but I could not locate that message

on the

archive.

It's not specific to R, which wraps regular expressions up in quoted
strings so has a couple of wrinkles compared to Perl, but I found the
O'Reilly " Regular Expression Pocket Reference" a good quick reference,
and rather cheaper than the whole book. It's hard to see R users needing
chapter and verse on the complete gamut of regexps.

Steve E