[R] Regular Expression and Pmatch

[gopher]

Hi, I wonder if there's a good intro to the pattern matching using R? I'm a perl
programer and find it too confusing and complex to use regular expressions under R.
For instance, why does pmatch("d","ad") returns NULL? How would I call the
functions in order to match any portion of the string? Under what circumstances shall
backslush be used? I try to extract all strings with ".d", however just couldnt manage
to do it? Any ideas? Or I have to write my own regex extension ? TIA.
-Yu
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._