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matching period with perl regular expression

Bill Venables 
You have the arguments out of line and you need two backslashes:
[1] "wa"
Bill Venables
http://www.cmis.csiro.au/bill.venables/ 


-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Stephen J. Barr
Sent: Thursday, 14 May 2009 9:42 AM
To: r-help at r-project.org
Subject: [R] matching period with perl regular expression

Hello,

I have several strings where I am trying to eliminate the period and
everything after the period, using a regular expression. However, I am
having trouble getting this to work.
[1] ""
Warning messages:
1: '\.' is an unrecognized escape in a character string
2: unrecognized escape removed from "\..*"

In perl, you can match a single period with \.
Is this not so even with perl=TRUE. I would like for x to be equal to
What am I missing here?
-stephen
==========================================
Stephen J. Barr
University of Washington
WEB: www.econsteve.com

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Thread (6 messages)

Stephen J. Barr matching period with perl regular expression May 13 Henrique Dallazuanna matching period with perl regular expression May 13 Gabor Grothendieck matching period with perl regular expression May 13 (Ted Harding) matching period with perl regular expression May 13 Bill Venables matching period with perl regular expression May 13 Dieter Menne matching period with perl regular expression May 14