[R] factor(300000, levels=1:300000) gives NA

[Jeff Newmiller]

I would say having 300000 levels is a bad idea... You should be re-thinking your analysis.

If you are still convinced that this is necessary, then do it right:

factor(300000L, levels=1:300000)

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Sent from my phone. Please excuse my brevity.

On September 20, 2014 3:52:15 AM PDT, Suharto Anggono Suharto Anggono <suharto_anggono at yahoo.com> wrote:
>In R:
>
>> factor(300000, levels=1:300000)
>[1] <NA>
>300000 Levels: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
>23 ... 300000
>
>The NA above is undesirable in my view, because 300000 is in 1:300000.
>
>
>I have just got bitten by it.
>
>
>I have figured out why it happens. The results of 'as.character' are
>different.
>
>> as.character(300000)
>[1] "3e+05"
>> as.character((1:300000)[300000])
>[1] "300000"
>
>
>> sessionInfo()
>R version 3.1.1 (2014-07-10)
>Platform: i386-w64-mingw32/i386 (32-bit)
>
>locale:
>[1] LC_COLLATE=English_United States.1252
>[2] LC_CTYPE=English_United States.1252
>[3] LC_MONETARY=English_United States.1252
>[4] LC_NUMERIC=C
>[5] LC_TIME=English_United States.1252
>
>attached base packages:
>[1] stats     graphics  grDevices utils     datasets  methods   base
>
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