all.names {base}R Documentation

Find All Names in an Expression

Description

Return a character vector containing all the names which occur in an expression or call.

Usage

all.names(expr, functions = TRUE, max.names = 200, unique = FALSE)

all.vars(expr, functions = FALSE, max.names = 200, unique = TRUE)

Arguments

expr an expression or call from which the names are to be extracted.
functions a logical value indicating whether function names should be included in the result.
max.names the maximum number of names to be returned.
unique a logical value which indicates whether duplicate names should be removed from the value.

Details

These functions differ only in the default values for their arguments.

Value

A character vector with the extracted names.

Examples

all.names(expression(sin(x+y)))
all.vars(expression(sin(x+y)))

[Package base version 2.1.0 Index]