Hi All, This is about subsetting using logicals. The code below is self-explanatory (I hope). Is this a bug or a feature?
Thanks, M > DT <- data.table(a = 1:8, b = c(TRUE, FALSE)) > ## This does *not* work, but it should (in my humble opinion). > DT[b] Error in eval(expr, envir, enclos) : object 'b' not found > ## This does work, but seems a bit awkward, given that b is already > ## logical. > DT[b == TRUE] a b 1: 1 TRUE 2: 3 TRUE 3: 5 TRUE 4: 7 TRUE > ## With data.frame things work as expected. > DF <- as.data.frame(DT) > DF[DF$b, ] a b 1 1 TRUE 3 3 TRUE 5 5 TRUE 7 7 TRUE > sessionInfo() R version 3.0.2 (2013-09-25) Platform: x86_64-redhat-linux-gnu (64-bit) locale: [1] LC_CTYPE=en_US.utf8 LC_NUMERIC=C LC_TIME=en_US.utf8 [4] LC_COLLATE=en_US.utf8 LC_MONETARY=en_US.utf8 LC_MESSAGES=en_US.utf8 [7] LC_PAPER=en_US.utf8 LC_NAME=C LC_ADDRESS=C [10] LC_TELEPHONE=C LC_MEASUREMENT=en_US.utf8 LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] data.table_1.9.2 colorout_1.0-1 loaded via a namespace (and not attached): [1] plyr_1.8.1 Rcpp_0.11.1 reshape2_1.2.2 stringr_0.6.2 _______________________________________________ datatable-help mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
