seems to work for me:
> library(data.table)
data.table 1.8.6 For help type: help("data.table")
> DT = data.table(X=as.POSIXct(
> c(rep("15DEC2008:00:00:00",10),"15DEC2008:00:00:00",rep("17DEC2008:00:00:00",2)),format="%d%b%Y:%H:%M:%S"),Y=c(1534,61,74,518,519,1519,1520,1524,3127,29250,30609,43,7853))
> setkey(DT,X,Y)
> DT
X Y
1: 2008-12-15 61
2: 2008-12-15 74
3: 2008-12-15 518
4: 2008-12-15 519
5: 2008-12-15 1519
6: 2008-12-15 1520
7: 2008-12-15 1524
8: 2008-12-15 1534
9: 2008-12-15 3127
10: 2008-12-15 29250
11: 2008-12-15 30609
12: 2008-12-17 43
13: 2008-12-17 7853
On Fri, Jan 18, 2013 at 9:44 AM, statquant <[email protected]> wrote:
> Hello I might have found a bug.
> I really cannot explain the following (please be indulgent as I narrowed the
> most I could).
>
> library(data.table)
> DT = data.table(X=as.POSIXct(
> c(rep("15DEC2008:00:00:00",10),"15DEC2008:00:00:00",rep("17DEC2008:00:00:00",2)),format="%d%b%Y:%H:%M:%S"),Y=c(1534,61,74,518,519,1519,1520,1524,3127,29250,30609,43,7853))
> setkey(DT,X,Y)
>
> #Here is what I see after the sort
>
> DT
> X Y
> 1: 2008-12-15 1534
> 2: 2008-12-15 61
> 3: 2008-12-15 74
> 4: 2008-12-15 518
> 5: 2008-12-15 519
> 6: 2008-12-15 1519
> 7: 2008-12-15 1520
> 8: 2008-12-15 1524
> 9: 2008-12-15 3127
> 10: 2008-12-15 29250
> 11: 2008-12-15 30609
> 12: 2008-12-17 43
> 13: 2008-12-17 7853
>
> #I thought that it was a POSIXct problem but if I can get the correct answer
> like this:
>
> DT[order(X,Y),]
> X Y
> 1: 2008-12-15 61
> 2: 2008-12-15 62
> 3: 2008-12-15 74
> 4: 2008-12-15 518
> 5: 2008-12-15 519
> 6: 2008-12-15 1519
> 7: 2008-12-15 1520
> 8: 2008-12-15 1524
> 9: 2008-12-15 3127
> 10: 2008-12-15 29250
> 11: 2008-12-15 30609
> 12: 2008-12-17 43
> 13: 2008-12-17 7853
>
> #Here is my session (just launched it)
>
> R> sessionInfo()
> R version 2.15.2 (2012-10-26)
> Platform: x86_64-pc-linux-gnu (64-bit)
>
> locale:
> [1] LC_CTYPE=en_GB.UTF-8 LC_NUMERIC=C LC_TIME=C
> [4] LC_COLLATE=en_GB.UTF-8 LC_MONETARY=fr_FR.UTF-8
> LC_MESSAGES=en_GB.UTF-8
> [7] LC_PAPER=C LC_NAME=C LC_ADDRESS=C
> [10] LC_TELEPHONE=C LC_MEASUREMENT=fr_FR.UTF-8
> LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats graphics grDevices datasets utils methods base
>
> other attached packages:
> [1] data.table_1.8.7 inline_0.3.10 Rcpp_0.10.2 vimcom_0.9-5
> setwidth_1.0-2
> [6] colorout_0.9-9
>
>
>
> _______________________________________________
> datatable-help mailing list
> [email protected]
> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
--
Jim Holtman
Data Munger Guru
What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.
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