The R data.
Hoping there's a simple answer here but I can't find it anywhere. I have a numeric matrix with labelled rows …
r dataframe transformation data.table reshapeI want to count and aggregate(sum) a column in a data.table, and couldn't find the most efficient way …
r dataframe data.table aggregateI have a problem with inconsistent encoding of character vector in R. The text file which I read a table …
r utf-8 character-encoding data.tableSuppose I have two data.table's: A: A B 1: 1 12 2: 2 13 3: 3 14 4: 4 15 B: A B 1: 2 13 2: 3 14 and I have the following code: merge_test = …
r merge data.tableI am using data.table and there are many functions which require me to set a key (e.g. X[…
r data.tableThe data.table has a nice feature that suppresses output to the head and tail of the table. Is it …
r printing data.table options output-formattingI am not very clear about use of .SD and by. For instance, does the below snippet mean: 'change all …
r data.tableWhat's the correct way to remove multiple columns from a data.table? I'm currently using the code below, but was …
r data.tableI'm importing a large .csv file into R (about 0.5 million rows), so I've been trying to use fread() from the …
r import data.table freadIn the help files for dcast.data.table, there is a note stating that a new feature has been implemented: "…
r data.table reshape reshape2