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: [email protected] #---- 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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