check_stvar function

Checks whether the given object has class attribute 'stvar'

check_stvar checks that the object has class attribute 'stvar'.

check_stvar(object, object_name)

Arguments

• object: S3 object to be tested
• object_name: what is the name of the object that should of class 'stvar'?

Returns

Throws an error if the object doesn't have the class attribute 'stvar'.