Re: [R] characters in a string

2010-09-15 Thread raje...@cse.iitm.ac.in
great! Thanks - Original Message - From: David Winsemius To: raje...@cse.iitm.ac.in Cc: r-help Sent: Wed, 15 Sep 2010 21:12:27 +0530 (IST) Subject: Re: [R] characters in a string On Sep 15, 2010, at 11:16 AM, raje...@cse.iitm.ac.in wrote: > > Hi, > > I need to check if a

Re: [R] characters in a string

2010-09-15 Thread David Winsemius
On Sep 15, 2010, at 11:16 AM, raje...@cse.iitm.ac.in wrote: Hi, I need to check if a string "a,b,c,d" is delimited by two "" 's as efficiently as possible(I need to do this a lot of times) and return TRUE. Can someone suggest a good technique? > txt <- "a,b,c,d" > > grep("^.+$", txt) [1

Re: [R] characters in a string

2010-09-15 Thread Romain Francois
Le 15/09/10 17:16, raje...@cse.iitm.ac.in a écrit : Hi, I need to check if a string "a,b,c,d" is delimited by two"" 's as efficiently as possible(I need to do this a lot of times) and return TRUE. Can someone suggest a good technique? Hi Rajesh, > f <- function( x ) grepl( "^.*$", x ) > f(

Re: [R] characters in a string

2010-09-15 Thread Marc Schwartz
On Sep 15, 2010, at 10:16 AM, raje...@cse.iitm.ac.in wrote: > > Hi, > > I need to check if a string "a,b,c,d" is delimited by two "" 's > as efficiently as possible(I need to do this a lot of times) and return TRUE. > Can someone suggest a good technique? See ?grep and ?regex > grepl("^.*$

[R] characters in a string

2010-09-15 Thread raje...@cse.iitm.ac.in
Hi, I need to check if a string "a,b,c,d" is delimited by two "" 's as efficiently as possible(I need to do this a lot of times) and return TRUE. Can someone suggest a good technique? [[alternative HTML version deleted]] __ R-help@r-project.