I'm trying to learn data.table package but I get a following annoying
error message:
> install.packages("data.table")
trying URL
'http://www.freestatistics.org/cran/bin/macosx/universal/contrib/2.10/data.table_1.2.tgz'
Content type 'application/x-gzip' length 66823 bytes (65 Kb)
opened URL
==================================================
downloaded 65 Kb
The downloaded packages are in
/var/folders/n-/n-wPTanPGa4PpVd0bTgCOU+++TI/-Tmp-//RtmppqPptG/downloaded_packages
> library(data.table)
> cr <- data.table(cars)
> cr[speed == 20]
speed dist
[1,] 20 32
[2,] 20 48
[3,] 20 52
[4,] 20 56
[5,] 20 64
Warning messages:
1: In `[.data.table`(cr, speed == 20) :
This R session is < 2.4.0. Please upgrade to 2.4.0+.
2: In `[.data.table`(cr, speed == 20) :
This R session is < 2.4.0. Please upgrade to 2.4.0+.
>
I'm using R 2.10.1 (see sessioninfo below), so why this error message
keeps popping up?
> sessionInfo()
R version 2.10.1 (2009-12-14)
i386-apple-darwin8.11.1
locale:
[1] fi_FI.UTF-8/fi_FI.UTF-8/C/C/fi_FI.UTF-8/fi_FI.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] data.table_1.2 ref_0.97
loaded via a namespace (and not attached):
[1] tools_2.10.1
>
-J
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