[datatable-help] data.table error: invalid subscript type, except it isn't.

[Michael Smith]

Have you imported data.table into your RAPI package?

M

On 06/11/2014 01:17 AM, Mikkel Grum wrote:
> Hello data.table useRs
> 
> I've written a function myTable that I've included in a package I've
> made myself (RAPI). The function calls library(data.table) and does a
> number of things to the data using the data.table functionality. On
> its own (cutting and pasting the code into R) the function works well,
> but when I install the package and then try to run the function, I get
> the following error
> 
>> library(RAPI)
>> myTable(11, '2014-06-09')
> data.table 1.9.2  For help type: help("data.table")
> Error in `[.default`(x, i) : invalid subscript type 'list'
> 
>> sessionInfo()
> R version 3.1.0 (2014-04-10)
> Platform: x86_64-pc-linux-gnu (64-bit)
> 
> locale:
>  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
>  [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
>  [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8
>  [7] LC_PAPER=en_US.UTF-8       LC_NAME=C
>  [9] LC_ADDRESS=C               LC_TELEPHONE=C
> [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
> 
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
> 
> other attached packages:
> [1] data.table_1.9.2 RODBC_1.3-10     RAPI_1.0
> 
> loaded via a namespace (and not attached):
> [1] plyr_1.8.1    Rcpp_0.11.1   reshape2_1.4  stringr_0.6.2
> 
> 
> The line that fails is
> stopsperrow <- myData[, length(timestamp), by = list(name, house, row)]
> 
> However, if I type the function name, myTable, and cut and paste the
> function from the console back into the console, the command produces
> the desired output without any hiccups! In other words the function in
> the package is OK, but something about the environment isn't right -
> if that's the right way to put it.
> 
> Any ideas for where I should be looking, or what I should be trying?
> 
> Regards
> Mikkel
>