On 09/25/2010 03:45 AM, Yong Wang wrote:
> dear list
>
> I know how to store a regex expression in perl and ruby, no clue on R.
> I do read R regex manual , archives, and searched on line,
> still I need somebody help me out on how to store a regular expression
> in a variable.
A regex is just a character string in R. So, e.g.
> str <- 'Now is the time '
> sub(' +$', '', str) ## spaces only
[1] "Now is the time"
> re <- ' +$'
> sub(re, '', str) ## spaces only
[1] "Now is the time"
--
Peter Dalgaard
Center for Statistics, Copenhagen Business School
Phone: (+45)38153501
Email: pd....@cbs.dk Priv: pda...@gmail.com
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