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

[Rui Barradas]

Hello,

Also gives an error in R 2.15.2 on Windows 7. 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.int(tbl.char1)
[1] 1 2
 > seq_along(tbl.char1)
[1] 1


So the plot command will have 2 values for the x axis but just one for 
the y axis.
seq_along seems to solve the matter.

Hope this helps,

Rui Barradas
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:
>> Hi all,
>>
>> there appears to be something strange with the plotting of tables of 1
>> dimension; if I attempt to make a plot of a table of characters with only
>> 1 value I get an error (Error in xy.coords(x, y, xlabel, ylabel, log) :
>>    'x' and 'y' lengths differ). With more than one value I don't get
>> errors, neither with integers (even if only 1 value):
>>
>> 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?
>
> Michael
>
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