var_is_a {swirl} | R Documentation |
Returns TRUE
if a variable of the given name exists
in the global environment and is of the given class.
var_is_a(class, var_name)
class |
expected class which the given variable |
var_name |
name of the variable |
TRUE
or FALSE
Other AnswerTests: AnswerTests
,
any_of_exprs
,
calculates_same_value
,
expr_creates_var
,
expr_identical_to
, expr_is_a
,
expr_uses_func
,
func_of_newvar_equals
,
omnitest
, val_has_length
,
val_matches
## Not run: # Test that a variable named "x" in the global environmentis numeric. var_is_a('numeric', 'x') ## End(Not run)