R: Is an Object a Language Object?

This help topic is for R version 0.60. For the current version of R, try https://stat.ethz.ch/R-manual/R-patched/library/base/html/is.language.html

is.language {base}

R Documentation

Is an Object a Language Object?

Description

is.language returns TRUE if x is either a variable name or an expression.

Usage

is.language(x)

[Package base version 0.60 ]