Re: [Rd] [R] error in plot(table(c('a','a')))

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Wed, 28 Nov 2012 14:29:48 +0000

On 28/11/2012 14:22, R. Michael Weylandt wrote:
> Should I file an issue for this in the bug tracker?

Someone already has. (15118, against R 2.14.0!)

>
> Slighly rearranged discussion with reproducible example follows on below.
>
>> Em 26-11-2012 21:39, R. Michael Weylandt escreveu:
>>>
>>> On Mon, Nov 26, 2012 at 2:41 PM, Ludo Pagie <l.pagie_at_nki.nl> wrote:
>>>> tbl.char1 <- table(c('a','a'))
>>>> tbl.char2 <- table(c('a','a','b'))
>>>> tbl.int1 <- table(c(1,1))
>>>>
>>>> # error:
>>>> plot(tbl.char1)
>>>>
>>>> # no errors:
>>>> plot(tbl.char2)
>>>> plot(tbl.int1)
>>>>
>>> Confirmed in current R-devel. It seems to arise from plot.table's use
>>> of seq.int(x) when the dimnames of the table are not integers. I'm not
>>> sure if this shouldn't be seq_along(x) instead, but I'm not sure I
>>> totally follow the internal logic, so perhaps someone can offer second
>>> opinion?
>
> On Mon, Nov 26, 2012 at 11:34 PM, Rui Barradas <ruipbarradas_at_sapo.pt> wrote:
>> I'd change "when the dimnames of the table are not integers "
>> to not numeric as that's what the code for plot.table tests. And it
>> seems to come from seq.int, since with table value
>> of 2, seq.int produces a vector of length 2 but the table length is 1:
>>
>> seq_along seems to solve the matter.
>
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>

-- 
Brian D. Ripley,                  ripley_at_stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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