The R data.
How do I extract a column from a data.table as a vector by its position? Below are some code …
r vector indexing data.tableI have a data.table with a character column, and want to select only those rows that contain a substring …
r data.table string-matching.SD looks useful but I do not really know what I am doing with it. What does it stand for? …
r data.tableI have a large data frame (in the order of several GB) that I'd like to convert to a data.…
r dataframe reference data.table[UPDATE: there is now a native transpose() function in data.table package] I often need to transpose a data.table, …
r data.tableI'm trying to use data.table to speed up processing of a large data.frame (300k x 60) made of several …
r data.tableI have a large dataset in data.table that I'd like to subset by a date range. My data set …
r data.table subset date-range sliceApparently in my last question I demonstrated confusion between data.frame and data.table. Admittedly, I didn't realize there was …
r data.tableI have following data and code to round selected columns of this data.table: > dput(mydf) structure(list(vnum1 = …
r data.tableI am trying to select those columns in a data.table whose name appears in my character vector. The operation …
r data.table