Thank you, Wacek,
for
>>>>> Wacek Kusnierczyk <[email protected]>
>>>>> on Sun, 29 Mar 2009 22:40:11 +0200 (CEST) writes:
> Full_Name: Wacek Kusnierczyk
> Version: 2.8.0 and 2.10.0 r48242
> OS: Ubuntu 8.04 Linux 32 bit
> Submission from: (NULL) (80.202.30.36)
> The following raises an error:
> if (as.raw(1)) 1
> # error: unimplemented type 'raw' in 'asLogical'
> However, ?'if' says:
> "
> Arguments:
> cond: A length-one logical vector that is not 'NA'. Conditions of
> length greater than one are accepted with a warning, but only
> the first element is used. Other types are coerced to
> logical if possible, ignoring any class.
> "
> and the help page does not mention raw type arguments to 'if' at all.
> The error above is in clear contradiction to the documentation. This
might be a
> flaw in the documentation, but the following succeeds:
> ifelse(raw(1), 1, 0)
> # 1
> which suggests that the error above is a bug (i.e., the implementation
fails to
> convert raw to logical).
> The same problem involves 'while':
> while(as.raw(1)) break
> # error: unimplemented type 'raw' in 'asLogical'
indeed, it was pretty straightforward hard to implement the missing case in
asLogical(.) and I will commit my patch to the sources tomorrow
{being busy otherwise for the rest of today}.
Note that the raw data type has been a newish addition to R a
while ago though, and if you find further cases where
such raw objects do not "work" as documented,
we'd gladly accept further such reports.
Regards,
Martin Maechler, ETH Zurich
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