select.dtplyr_step {dtplyr}

Subset columns using their names

Description

This is a method for the dplyr select() generic. It is translated to the j argument of ⁠[.data.table⁠.

Usage

## S3 method for class 'dtplyr_step'
select(.data, ...)

Arguments

.data

A lazy_dt().

...

<tidy-select> One or more unquoted expressions separated by commas. Variable names can be used as if they were positions in the data frame, so expressions like x:y can be used to select a range of variables.

Examples

library(dplyr, warn.conflicts = FALSE)

dt <- lazy_dt(data.frame(x1 = 1, x2 = 2, y1 = 3, y2 = 4))

dt %>% select(starts_with("x"))
dt %>% select(ends_with("2"))
dt %>% select(z1 = x1, z2 = x2)