[R] split list of characters in groups of 2

[Uwe Ligges]

On 17.11.2011 10:31, Dennis Murphy wrote:
> Hi:
>
> Here's one way:
>
> apply(matrix(var.names, ncol = 2, byrow = TRUE), 1, function(x)
> paste(x[1], x[2], sep = ','))
> [1] "a,b" "c,d" "e,f"

Or for short and slightly faster for huge data use column-wise 
operations as in:

apply(matrix(var.names, nrow=2), 2, paste, collapse=", ")

Best,
Uwe Ligges



> HTH,
> Dennis
>
> On Wed, Nov 16, 2011 at 9:46 PM, B77S<bps0002 at auburn.edu>  wrote:
>> hi,
>>
>> If i have a list of things, like this
>>
>> var.names<- c("a", "b", "c", "d", "e", "f")
>>
>> how can i get this:
>>
>> "a, b", "c, d", "e, f"
>>
>> thanks ahead of time.
>>
>>
>> --
>> View this message in context: http://r.789695.n4.nabble.com/split-list-of-characters-in-groups-of-2-tp4079031p4079031.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
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>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.