[R] regex pattern assistance

[Rui Barradas]

Hello,

I don't believe you need an extra package for that. Try


sub("\\/mnt\\/AO\\/AO Data\\/([-[:alnum:]]*)\\/.+", "\\1", x)

or, with package stringr,

str_match(x,"\\/mnt\\/AO\\/AO Data\\/(.+)\\/.+")


Hope this helps,

Rui Barradas

Em 15-08-2014 17:18, Tom Wright escreveu:
> Hi,
> Can anyone please assist.
>
> given the string
>
>> x<-"/mnt/AO/AO Data/S01-012/120824/"
>
> I would like to extract "S01-012"
>
> require(stringr)
>> str_match(x,"\\/mnt\\/AO\\/AO Data\\/(.+)\\/+")
>> str_match(x,"\\/mnt\\/AO\\/AO Data\\/(\\w+)\\/+")
>
> both nearly work. I expected I would use something like:
>> str_match(x,"\\/mnt\\/AO\\/AO Data\\/([\\w -]+)\\/+")
>
> but I don't seem able to get the square bracket grouping to work
> correctly. Can someone please show me where I am going wrong?
>
> Thanks,
> Tom
>
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