Index of /datascience/misc/rscripts/data.table learn

Name ↑SizeModified
⬆..📁bugs-2026-09-14 06:25📄!notes.r225 B2026-07-13 03:27📄@MD_Rprofile.r2.7 KB2026-07-13 03:27📄adding column after join.r7.7 KB2026-07-13 03:27📄adding new row based on criteria of existing rows.R1.1 KB2026-07-13 03:27📄benchmark apply vs by_row.R1.8 KB2026-07-13 03:27📄benchmark data.table copy.R2.9 KB2026-07-13 03:27📄benchmark dt v reshape2.R2.0 KB2026-07-13 03:27📄benchmark dt vs plyr.R12.1 KB2026-07-13 03:27📄benchmark reshape2 2.R5.7 KB2026-07-13 03:27📄benchmark using functions on a column .R5.4 KB2026-07-13 03:27📄bfr aftr avg.R1.5 KB2026-07-13 03:27📄Binary OR search.R8.9 KB2026-07-13 03:27📄bug - factors.R2.3 KB2026-07-13 03:27📄BUG - using sdcols to copy.R325 B2026-07-13 03:27📄bug to report.R408 B2026-07-13 03:27📄BUG_ft - factors in i.syntax .R182 B2026-07-13 03:27📄by and uniqueness.R210 B2026-07-13 03:27📄Changing Levels in data.table.R1.0 KB2026-07-13 03:27📄colQuote - Question on SO.R1.7 KB2026-07-13 03:27📄colQuote.R249 B2026-07-13 03:27📄combining columns via a list.R1.5 KB2026-07-13 03:27📄Combining data.tables with differing columns.R1.1 KB2026-07-13 03:27📄COMPARE- lists in data.table.R202 B2026-07-13 03:27📄cumsum with data.table.R1.0 KB2026-07-13 03:27📄data.frame vs data.table examples .R643 B2026-07-13 03:27📄data.table indexing.R3.6 KB2026-07-13 03:27📄debugging data.table.R122 B2026-07-13 03:27📄error in setNames.R809 B2026-07-13 03:27📄eval in data.table.R609 B2026-07-13 03:27📄expecting V1, V2, etc.R1.3 KB2026-07-13 03:27📄factor bug.R1005 B2026-07-13 03:27📄for loop to data.table.R1.7 KB2026-07-13 03:27📄get vs eval.R468 B2026-07-13 03:27📄getColumns function.R991 B2026-07-13 03:27📄gotchas, data.table.R723 B2026-07-13 03:27📄gotchas.R256 B2026-07-13 03:27📄joining data.tables - correct way.r1.4 KB2026-07-13 03:27📄JSON from DT.R2.5 KB2026-07-13 03:27📄LEVELS ISSUE - ?.R863 B2026-07-13 03:27📄Merge Issue.r2.1 KB2026-07-13 03:27📄merges, different kinds of.r875 B2026-07-13 03:27📄merging and lookup.R1.3 KB2026-07-13 03:27📄merging data.tables805 B2026-07-13 03:27📄merging two tables instead of sapply.R693 B2026-07-13 03:27📄multiple RHS.R789 B2026-07-13 03:27📄naming columns with mapply.R2.0 KB2026-07-13 03:27📄ordering id.R914 B2026-07-13 03:27📄pass by reference.R1.2 KB2026-07-13 03:27📄PITFALLS.r361 B2026-07-13 03:27📄rbind on data.frames follow up.R1.0 KB2026-07-13 03:27📄rbinding many.R3.6 KB2026-07-13 03:27📄rbindlist on data.frames.R1.6 KB2026-07-13 03:27📄referencing Data.tables and Columns.R5.7 KB2026-07-13 03:27📄rollapply with data.table.r1.3 KB2026-07-13 03:27📄SD and get.R828 B2026-07-13 03:27📄SD by group.R777 B2026-07-13 03:27📄searching for column names, then summing by row.R1.4 KB2026-07-13 03:27📄setattr levels.R2.1 KB2026-07-13 03:27📄SLOW.R1.3 KB2026-07-13 03:27📄table per column.R3.8 KB2026-07-13 03:27📄text processing speed using r and data.table.R8.9 KB2026-07-13 03:27📄unique rows email.R1.8 KB2026-07-13 03:27📄using .I.r593 B2026-07-13 03:27📄V1584 B2026-07-13 03:27📄variables in j.R1008 B2026-07-13 03:27📄WHY? .R261 B2026-07-13 03:27