as.function {base}

R Documentation

Convert Object to Function

Description

as.function is a generic function which is used to convert objects to functions.

as.function.default works on a list x, which should contain the concatenation of a formal argument list and an expression or an object of mode "call" which will become the function body. The function will be defined in a specified environment, by default that of the caller.

Usage

as.function(x, ...)

## Default S3 method:
as.function(x, envir = parent.frame(), ...)

Arguments

x	object to convert, a list for the default method.
...	additional arguments, depending on object
envir	environment in which the function should be defined

Value

The desired function.

Note

For ancient historical reasons, envir = NULL uses the global environment rather than the base environment. Please use envir = globalenv() instead if this is what you want, as the special handling of NULL may change in a future release.

Author(s)

Peter Dalgaard

See Also

function; alist which is handy for the construction of argument lists, etc.

Examples

as.function(alist(a=,b=2,a+b))
as.function(alist(a=,b=2,a+b))(3)

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