[datatable-help] Behavior of CJ

[Matthew Dowle]

I would have sworn blind we had lots of tests of CJ(), but there are only
two.  Ok, please add as bug report.  Same issue as Chris.

Matthew

> All,
>
> CJ is behaving a little different (throwing an error) than it has
> previously and I'm not sure whether this is a bug or a desired feature.
>
> tmp.content_areas <- factor(c("READING", "MATHEMATICS"))
> tmp.years <- factor(c("2010_2011", "2009_2010", "2008_2009"),
> levels=paste(2006:2010, 2007:2011, sep="_"))
>
> CJ(tmp.content_areas, tmp.years)
> Error in setkey(l) : logical error nrow(dt)!=length(order)
>
>
> However:
>
> CJ(tmp.content_areas, sort(tmp.years))
>
>               V1        V2
> [1,]     READING 2008_2009
> [2,]     READING 2009_2010
> [3,]     READING 2010_2011
> [4,] MATHEMATICS 2008_2009
> [5,] MATHEMATICS 2009_2010
> [6,] MATHEMATICS 2010_2011
>
>
> Any help greatly appreciated,
>
> Damian
>
> Damian Betebenner
> Center for Assessment
> PO Box 351
> Dover, NH   03821-0351
>
> Phone (office): (603) 516-7900
> Phone (cell): (857) 234-2474
> Fax: (603) 516-7910
>
> dbetebenner at nciea.org<mailto:dbetebenner at nciea.org>
> www.nciea.org<http://www.nciea.org/>
>
>
>
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