[Rd] The behaviour of setting names differs between lists and atomic vectors
maechler at stat.math.ethz.ch
Mon Aug 25 17:53:58 CEST 2014
>>>>> peter dalgaard <pdalgd at gmail.com>
>>>>> on Thu, 21 Aug 2014 16:11:38 +0200 writes:
> On 21 Aug 2014, at 15:47 , Duncan Murdoch
> <murdoch.duncan at gmail.com> wrote:
>> On 21/08/2014 9:26 AM, Richard Cotton wrote:
>>> If you set the names in a list, some cat-style
>>> processing seems to happen. For example, backslashes
>>> are modified. This behaviour doesn't happen with atomic
>>> vectors. Compare, for example:
>>> setNames(1, "a\\b") ## a\\b ## 1 setNames(list(1),
>>> "a\\b") ## $`a\b` ##  1
>>> Notice that the name of the element in the list has been
>>> changed to 'a', 'backspace'.
>>> Is this behaviour intended, or a bug?
>> I think there's a bug, but not in names<- (or setNames,
>> which calls it). The bug is in the printing, as you'll
>> see if you look at names(setNames(list(1), "a\\b")).
> Yep, slight variant:
>> l <- list(`a\\b`=1) l
> $`a\b`  1
>  1
With thanks to the OP, Richie,
this is now fixed in R-devel and R-patched, i.e., in any next
version of R.
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