[R] Failure to subset in R v 2.8.0

[Peter Dalgaard]

Alan Cohen wrote:
> Hello,
> 
> I've been using a pre-release version of R v 2.8.0 for Windows for the last couple months.  I think that there have been consistent problems with subsetting data sets, but I had usually been able to find work-arounds or was unable to confirm this as a bug.  I think now I have, and would love advice on what to do if I've made some error.
> 
> The data set in question ("c") has 500,000 observations and 44 variables.  The problematic variable, "month," takes integer values 1:12, and all are present in the data set:
> 
>> unique(c$month)
>  [1] 11 10  9  8 12  1  7  4  6  2  5  3
> 
> However, I can't select observations of c for certain values of month:
...

>> length(c$month[c$month==11])
> [1] 0

Hmm.

Does any of these make us any wiser?

mode(c$month)
any(c$month==11)
table(c$month)
dput(unique(c$month))

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