R devel - Oct 2010 - tabulate() does not check for input bounds

Dear all,

it looks like that tabulate() does not check for the bounds of the input.
Reproducible example:

 > b <- 1:2
> tabulate(b[1:100])
[1] 1 1
> R.version
               _
platform       i386-pc-mingw32
arch           i386
os             mingw32
system         i386, mingw32
status         Patched
major          2
minor          11.1
year           2010
month          09
day            30
svn rev        53072
language       R
version.string R version 2.11.1 Patched (2010-09-30 r53072)
> sessionInfo()
R version 2.11.1 Patched (2010-09-30 r53072)
Platform: i386-pc-mingw32 (32-bit)

locale:
[1] LC_COLLATE=Italian_Italy.1252  LC_CTYPE=Italian_Italy.1252
LC_MONETARY=Italian_Italy.1252
[4] LC_NUMERIC=C                   LC_TIME=Italian_Italy.1252

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

other attached packages:
[1] gtools_2.6.2

loaded via a namespace (and not attached):
[1] tools_2.11.1

OS: Windows 7 64 bit
--
______________________________________________________

Simone Giannerini
Dipartimento di Scienze Statistiche "Paolo Fortunati"
Universita' di Bologna
Via delle belle arti 41 - 40126? Bologna,? ITALY
Tel: +39 051 2098262? Fax: +39 051 232153
http://www2.stat.unibo.it/giannerini/

Dear Simone,

On 04.10.2010, at 01:01, Simone Giannerini wrote:
> it looks like that tabulate() does not check for the bounds of the input.
> Reproducible example:
> 
>> b <- 1:2
>> tabulate(b[1:100])
> [1] 1 1
this looks perfectly reasonable. Consider the result of 
> b <- 1:2
> b[1:100]
  [1]  1  2 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
 [26] NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
 [51] NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
 [76] NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA

and check the help page for tabulate (esp. the na.rm argument).

What was your expected result?

Cheers,
Olaf