[R] regular expressions

[Christos Hatzis]

Try this one:

> gsub("^(plif)([a-z]*)", "\\1ONE", words)
[1] "plifONE"   "plafboum"  "ploufbang" "plifONE"  

-Christos

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of GOUACHE David
> Sent: Wednesday, March 12, 2008 12:15 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] regular expressions
> 
> Hello all,
>  
> Still fighting with regular expressions and such, I am again stuck:
>  
> Suppose I have a vector of character chains. In this vector, 
> I wish to identify which character chains start with a given 
> pattern, and then replace everything that comes after said pattern.
>  
> Here is a quick example :
>  
> words<-c("plifboum","plafboum","ploufbang","plifplaf")
>  
> I want to end up with something like this:
>  
> "plifONE","plafboum","ploufbang","plifONE"
>  
> All I can produce so far is this :
> gsub("\\bplif.","ONE",words,perl=T)
>  
> which turns out :
> "ONEboum","plafboum","ploufbang","ONEplaf"
>  
> Thanks in advance for your help.
>  
> David Gouache
> 
> Arvalis - Institut du Végétal
> 
> Station de La Minière
> 
> 78280 Guyancourt
> 
> Tel: 01.30.12.96.22 / Port: 06.86.08.94.32
> 
>  
>  
> 
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