R help - Nov 2012 - error in plot(table(c('a','a')))

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)


sessionInfo()


R version 2.14.0 (2011-10-31)
Platform: i686-pc-linux-gnu (32-bit)

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8
 [7] LC_PAPER=C                 LC_NAME=C
 [9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base



Thanks, Ludo

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