nest_expr: Nest expressions as a functional chain

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

Nest expressions as a functional chain

Description

Nest expressions as a functional chain

Usage

nest_expr(
  ...,
  .start = TRUE,
  .end = .start,
  .parse = getOption("table.express.parse", FALSE)
)

Arguments

...	Expressions that will be part of the functional chain.
.start	Whether to add a start_expr() call at the beginning of the chain.
.end	Whether to add an end_expr() call at the end of the chain.
.parse	Logical. Whether to apply rlang::parse_expr() to obtain the expressions.

Details

All expressions in ... are "collapsed" with %>%, passing the ExprBuilder's captured data.table as the initial parameter. Names are silently dropped.

The chain is evaluated eagerly and saved in the ExprBuilder instance to be used during final expression evaluation.

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

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