[R] Splitting a character vector.
John Kane
jrkrideau at inbox.com
Sun Jul 8 00:21:09 CEST 2012
Ah, I think Mark may have it. See my earlier post. Why the space?
John Kane
Kingston ON Canada
> -----Original Message-----
> From: ruipbarradas at sapo.pt
> Sent: Sat, 07 Jul 2012 23:12:46 +0100
> To: markleeds2 at gmail.com
> Subject: Re: [R] Splitting a character vector.
>
> Oh, right!
>
> The close parenthesis isn't doing nothing in the result, t could be done
> after but since we're to it...
>
> Rui Barradas
>
> Em 07-07-2012 23:10, Mark Leeds escreveu:
>> Hi Rui: I think he's asking about your replacement with blanks.
>>
>>
>> On Sat, Jul 7, 2012 at 6:08 PM, Rui Barradas <ruipbarradas at sapo.pt
>> <mailto:ruipbarradas at sapo.pt>> wrote:
>>
>> 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 <mailto:ruipbarradas at sapo.pt>
>> Sent: Sat, 07 Jul 2012 22:55:41 +0100
>> To: jrkrideau at inbox.com <mailto: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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>
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