[R] regexp inside and outside brackets

[Adrian Dușa]

Thanks very much, Marc and Jeff.
Jeff's solutions seem to be simple one liners. I really need to learn these
things, too powerful to ignore.

Thank you very much,
Adrian

On Fri, Dec 11, 2015 at 5:05 PM, Jeff Newmiller <jdnewmil at dcn.davis.ca.us>
wrote:

> The gsub function is your friend.
>
> s <- "A1{0}~B0{1} CO{a2}NN{12}"
> gsub( "([^{}]*)\\{([^{}]*)\\}", "\\1 ", s )
> gsub( "([^{}]*)\\{([^{}]*)\\}", "\\2 ", s )
>
> but keep in mind that there are many resources on the Internet for
> learning about regular expressions... they are hardly R-specific.
>
> --
> Sent from my phone. Please excuse my brevity.
>
> On December 11, 2015 5:50:28 AM PST, "Adrian Dușa" <dusa.adrian at unibuc.ro>
> wrote:
>>
>> For the regexp aficionados, out there:
>>
>> I need a regular expression to extract either everything within some
>> brackets, or everything outside the brackets, in a string.
>>
>> This would be the test string:
>> "A1{0}~B0{1} CO{a2}NN{12}"
>>
>> Everything outside the brackets would be:
>>
>> "A1 ~B0 CO NN"
>>
>> and everything inside the brackets would be:
>>
>> "0 1 a2 12"
>>
>> I have a working solution involving strsplit(), but I wonder if there is a
>> more direct way.
>> Thanks in advance for any hint,
>> Adrian
>>
>>


-- 
Adrian Dusa
University of Bucharest
Romanian Social Data Archive
Soseaua Panduri nr.90
050663 Bucharest sector 5
Romania

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