Hi!
Jean-Baptiste Combes wrote:
> Hello,
>
> I use R 2.10, and I am new in R (I used to use SAS and lately Stata), I am
> using XP.
>
> I have a data which has a data.frame format called x.df (read from a csv
> file). I want to take from this data observations for which the variable
> "Code" starts with an "R". I took all the Code and put them into a vector
> vec<-grep("R[A-Z][A-Z]",x.df$Code,value=TRUE)
I am not sure if I understood you correctly, but could a simple:
subset(x.df, substring(Code,1,1)=="R")
be an appropriate solution?
HTH,
Kimmo
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