select-table.express: Select clause

In table.express: Build 'data.table' Expressions with Data Manipulation Verbs

Select clause

Description

Select columns of a data.table::data.table.

Usage

## S3 method for class 'ExprBuilder'
select(
  .data,
  ...,
  .negate = FALSE,
  .parse = getOption("table.express.parse", FALSE),
  .chain = getOption("table.express.chain", TRUE)
)

## S3 method for class 'EagerExprBuilder'
select(.data, ..., .parent_env = rlang::caller_env())

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

Arguments

.data	An instance of ExprBuilder.
...	Clause for selecting columns. For j inside the data.table's frame.
.negate	Whether to negate the selection semantics and keep only columns that do not match what's given in ....
.parse	Logical. Whether to apply rlang::parse_expr() to obtain the expressions.
.chain	Logical. Should a new frame be automatically chained to the expression if the clause being set already exists?
.parent_env	See end_expr()

Details

The expressions in ... support tidyselect::select_helpers.

To see more examples, check the vignette, or the table.express-package entry.

Examples

data("mtcars")

data.table::as.data.table(mtcars) %>%
    select(mpg:cyl)

table.express documentation built on April 3, 2023, 5:43 p.m.