[datatable-help] Crash when assigning column.

[Ricky Saporta]

Hello,
When attempting to run the line of code below, R crashes.
I tried it on two systems with same results.

Any thoughts as to why the crash (as opposed to say an error)?
Thanks for any help and insight

-- 
Ricardo Saporta
Graduate Student, Data Analytics
Professional Science Masters
Rutgers University, New Jersey
e: saporta at rutgers.edu



#---- SAMPLE DATA -------#
library(data.table)
test.dt <- structure(list(
    ID = c(4089L, 4090L, 4090L, 4091L, 4091L, 4092L, 4092L,
           4093L, 4093L, 4093L, 4094L, 4094L, 4094L),
    name = c("A", "B", "C", "D", "E", "F", "G", "H",
             "I", "J", "K", "L", "M"),
    order = list("A", c("B", "C"), c("B", "C"), c("D", "E"),
                 c("D", "E"), c("F", "G"), c("F", "G"),
                 c("H", "I", "J"), c("H", "I", "J"),
                 c("H", "I", "J"),c("K", "L", "M"),
                 c("K", "L", "M"), c("K", "L", "M"))),
    .Names = c("ID", "name", "order"), row.names = c(NA, -13L),
    class = c("data.table", "data.frame"))


#---- OFFENDING LINE -------#

  # this line causes R to crash.
  test.dt[, tc := which(name==order), by=list(ID, name)]

  #  this is the line that I should have used
  test.dt[, tc := which(name == order[[1]]), by=list(ID, name)]


#---- SESSION INFO -------#

## SYSTEM 1:
  > sessionInfo()
R version 2.15.2 (2012-10-26)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:
 [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C         LC_TIME=C
 LC_COLLATE=C         LC_MONETARY=C
 [6] LC_MESSAGES=C        LC_PAPER=C           LC_NAME=C
 LC_ADDRESS=C         LC_TELEPHONE=C
[11] LC_MEASUREMENT=C     LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] rbenchmark_1.0.0 stringr_0.6.1    data.table_1.8.6 RMySQL_0.9-3
DBI_0.2-5

loaded via a namespace (and not attached):
[1] plyr_1.7.1   tools_2.15.2

## SYSTEM 2:
> sessionInfo()
R version 2.15.1 (2012-06-22)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] data.table_1.8.6
>
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