Thanks so much for your help, now I could solve the problem (using [.])!
2013/5/13 arun <smartpink...@yahoo.com>
> You may also try:
> grepl("[.]",c("ad.1","ads","ad.2"))
> #[1] TRUE FALSE TRUE
> A.K.
>
>
>
> ----- Original Message -----
> From: Francesco Isotta <isot...@hotmail.com>
> To: r-help@r-project.org
> Cc:
> Sent: Monday, May 13, 2013 4:19 AM
> Subject: [R] grepl
>
> Hello,
> it is not clear to me, how to search if in a string there is a "." (full
> stop).
> Using:
>
> grepl(".",string)
>
> doesn't work because the full stop it is a metacharacter (it gives "TRUE"
> also if no full stop is in the character). I tried also to insert \. but it
> does not work.
>
> > grepl("\.",string)
> Error: '\.' is an unrecognized escape in character string starting "\."
>
> Thank you very much for your help
>
> Francesco
>
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>
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