[datatable-help] R Studio Interactions with data.table

[Arunkumar Srinivasan]

Zack,
I'm able to reproduce the crash and the occasional warning. Will look into
it - filed #5647<https://r-forge.r-project.org/tracker/index.php?func=detail&aid=5647&group_id=240&atid=975>.
Thanks for reporting.
Arun.


On Tue, Apr 22, 2014 at 8:07 PM, Zachary Long <long at dc-energy.com> wrote:

> Hello,
>
> I was wondering if an error like this had been addressed before. I am
> using data table 1.9.2.
>
> It appears that the error has to do with the interaction with R-Studio.
> When I run
>
> library(data.table)
>
> dt<-data.table(strip="Nov08",date=c("2006-08-01","2006-08-02","2006-08-03","2006-08-04","2006-08-07",
>
>                                     "2006-08-08","2006-08-09","2006-08-10","2006-08-11","2006-08-14"))
> dt[,forward_date:=c(rep(NA,5),date),by='strip']
>
>
> The result I expect is below, along with a warning message.
>
> strip       date forward_date
>  1: Nov08 2006-08-01           NA
>  2: Nov08 2006-08-02           NA
>  3: Nov08 2006-08-03           NA
>  4: Nov08 2006-08-04           NA
>  5: Nov08 2006-08-07           NA
>  6: Nov08 2006-08-08   2006-08-01
>  7: Nov08 2006-08-09   2006-08-02
>  8: Nov08 2006-08-10   2006-08-03
>  9: Nov08 2006-08-11   2006-08-04
> 10: Nov08 2006-08-14   2006-08-07
>
>
> However, I don't get this.
>
> 1 of two things can happen.
>
> 1. My R-Studio will completely crash without warning. All unsaved
> information is lost.
> 2. I can get "Error: Value of SET_STRING_ELT() must be a 'CHARSXP' not a
> 'character'" "In addition:Lost warning messages"
>
> Do you know what is the cause here? It seems related to memory allocation,
> or something under the hood relating to the interaction of R-Studio and
> data table.
>
> Zach
>
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