Parentheses and Braces

Description

Open parenthesis, (, and open brace, {, are .Primitive functions in R.

Effectively, ( is semantically equivalent to the identity function(x) x, whereas { is slightly more interesting, see examples.

Usage

( ... )

{ ... }

See Also

if, return, etc for other objects used in the R language itself.

Examples

f <- get("(")
e <- expression(3 + 2 * 4)
f(e) == e           # TRUE

do <- get("{")
do(x_ 3, y_ 2*x-3, 6-x-y); x; y