[R] string manipulation

[Steven Kennedy]

You can split your string, and then only take the first 4 digits after
that (this is only an improvement if your numbers might not be at the
end of mytext):

mytext <- "I do not want the first number 1234, but the second number 5678"
sstr<-strsplit(mytext,split="second number ")[[1]][2]
nynumbers<-substr(sstr,1,4)


On Fri, Aug 26, 2011 at 11:18 AM, Henrique Dallazuanna <wwwhsd at gmail.com> wrote:
> Try this:
>
> gsub(".*second number ", "", mytext)
>
> On Thu, Aug 25, 2011 at 8:00 PM, Lorenzo Cattarino
> <l.cattarino at uq.edu.au> wrote:
>> I R-users,
>>
>> I am trying to find the way to manipulate a character string to select a 4 digit number after some specific word/s. Example:
>>
>> mytext <- "I do not want the first number 1234, but the second number 5678"
>>
>> Is there any function that allows you to select a certain number of digits (in this case 5678) after a particular word/s (e.g., second number)
>>
>> Thank you for your help
>>
>> Lorenzo
>>
>>
>>        [[alternative HTML version deleted]]
>>
>> ______________________________________________
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>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>
>
> --
> Henrique Dallazuanna
> Curitiba-Paraná-Brasil
> 25° 25' 40" S 49° 16' 22" O
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>