[datatable-help] Behavior of CJ

[Chris Neff]

Bug submitted here:
https://r-forge.r-project.org/tracker/index.php?func=detail&aid=1689&group_id=240&atid=975


On 2 December 2011 08:07, Matthew Dowle <mdowle at mdowle.plus.com> wrote:
>
> 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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>
>
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