Hi I did search but did not see an answer.
I have a dt with 580 + columns. many of the columns will have variations of a name to specifically identify them, ie, call23,Call111, doCall.now, etc. Since I cannot recall the exact column names I have been resorting to df <- data.frame(dt) and then a <- grep("Call1", colnames(df)) colnames(df[a]) which then returns the columns names containing Call1. If I try this with the data table ie, colnames(dt[a]) I get null. Any suggestions? I am feeling rather ignorant converting a dt back to a data frame and available memory may be a concern further down the road. Carl Sutton ----- Carl Sutton -- View this message in context: http://r.789695.n4.nabble.com/finding-dt-columns-by-partial-name-tp4718464.html Sent from the datatable-help mailing list archive at Nabble.com. _______________________________________________ datatable-help mailing list datatable-help@lists.r-forge.r-project.org https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help