is.formula

<p>The function <code>is.formula</code> tests if the object 
<code>x</code> is a formula.</p>

A collection of miscellaneous functions for
copying objects to the clipboard ('Copy');
manipulating strings ('concat', 'mgsub', 'trim', 'verlan');
loading or showing packages ('library_with_dep', 'require_with_dep',
'sessionPackages');
creating or testing for named lists ('nlist', 'as.nlist', 'is.nlist'),
formulas ('is.formula'), empty objects ('as.empty', 'is.empty'),
whole numbers ('as.wholenumber', 'is.wholenumber');
testing for equality ('almost.equal', 'almost.zero') and computing
uniqueness ('almost.unique');
getting modified versions of usual functions ('rle2', 'sumNA');
making a pause or a stop ('pause', 'stopif');
converting into a function ('as.fun');
providing a C like ternary operator ('condition %?% true %:% false');
finding packages and functions ('get_all_pkgs', 'get_all_funs');
and others ('erase', '%nin%', 'unwhich', 'top', 'bot', 'normalize').

is.formula: Test if an object is a formula

Description

Usage

Arguments

Value

Examples