[R] Regular expressions & sub

Tony Plate tplate at acm.org
Thu Aug 18 18:34:57 CEST 2005


 > x <- scan("clipboard", what="")
Read 7 items
 > x
[1] "1.11"   "10.11"  "11.11"  "113.31" "114.2"  "114.3"  "114.8"
 > gsub("[0-9]*\\.", "", x)
[1] "11" "11" "11" "31" "2"  "3"  "8"
 >


Bernd Weiss wrote:
> Dear all,
> 
> I am struggling with the use of regular expression. I got
> 
> 
>>as.character(test$sample.id)
> 
>  [1] "1.11"   "10.11"  "11.11"  "113.31" "114.2"  "114.3"  "114.8"  
> 
> and need
> 
> [1] "11"   "11"  "11"  "31" "2"  "3"  "8"
> 
> I.e. remove everything before the "." .
> 
> TIA,
> 
> Bernd
> 
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