hutils (version 2.0.0)

selector: Fast selection of data.table columns

Description

Present since hutils 1.2.0.

Usage

selector(DT, ..., cols = NULL, preserve.key = TRUE, shallow = FALSE)

Value

DT with the selected columns.

Arguments

DT

A data.table.

...

Unquoted columns names.

cols

Character vector of column names.

preserve.key

(logical, default: TRUE) Reapply the key (if DT has one)?

shallow

(logical, default: FALSE) Should the result be a shallow copy of DT's columns or should the columns be assigned by reference? If TRUE, any modification to the result also modifies the selected columns in DT.

Examples

RQ("nycflights13", no = {
 library(nycflights13)
 library(data.table)
 fs <- as.data.table(flights)
 fs1 <- selector(fs, year, month, day, arr_delay)
 fs1[, arr_delay := NA]
})