[R] Splitting a character vector.

[Rui Barradas]

Hello,

Sorry, but I don't understand, you're asking about 4 single quotes, the 
double quotes in open.par are just opening and closing the pattern, a 
character string.

Rui Barradas

Em 07-07-2012 23:03, John Kane escreveu:
> Thanks Rui
> It works perfectly so far on the test and real data.
>
> The annoying thing is that I had tried , or thought I'd tried the open.par format and keep getting an error.
>
>   It looks like I had failed to add the '''',  in the term. What is it doing?
>
>
>
> John Kane
> Kingston ON Canada
>
>
>> -----Original Message-----
>> From: ruipbarradas at sapo.pt
>> Sent: Sat, 07 Jul 2012 22:55:41 +0100
>> To: jrkrideau at inbox.com
>> Subject: Re: [R] Splitting a character vector.
>>
>> Hello,
>>
>> Try the following.
>>
>> open.par <- " \\("  # with a blank before '('
>> close.par <- "\\)"
>> result <- strsplit(sub(close.par, "", dd1), open.par)
>>
>>
>> Why the two '\\'? Because '(' is a meta-character so it must be escaped.
>> But '\' is a meta character so it must also be escaped.
>>
>> Then choose the right way to separate the two, maybe something like
>>
>> ix <- rep(c(TRUE, FALSE), length(result))
>> unlist(result)[ix]
>> unlist(result)[!ix]
>>
>>
>> Hope this helps,
>>
>> Rui Barradas
>>
>> Em 07-07-2012 22:37, John Kane escreveu:
>>> I am lousy at simple regex and I have not found a solution to a simple
>>> problem.
>>>
>>> I have a vector with some character values that I want to split.
>>> Sample data
>>> dd1  <-  c( "XXY (mat harry)","XXY (jim bob)", "CAMP (joe blow)", "ALP
>>> (max jack)")
>>>
>>> Desired result
>>> dd2  <-  data.frame( xx = c("XXY", "XXY", "CAMP", "ALP"), yy = c("mat
>>> harry", "jim bob" , "joe blow", "max jack"))
>>>
>>> I thought I should be able to split the characters with strsplit but
>>> either I am misunderstanding the function or don't know how to escape a
>>> "(" properly in an effort to at least get   "XXY" "(mat harry)"
>>>
>>> Any pointers would be appreciated
>>> Thanks
>>> John Kane
>>> Kingston ON Canada
>>>
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