| predicate-type | R Documentation | 
Type Predicates
is_list(x)
is_atomic(x)
is_vector(x)
is_numeric(x)
is_integer(x)
is_double(x)
is_character(x)
is_logical(x)
is_error(x)
is_warning(x)
is_message(x)
| x | An object to be tested. | 
A logical scalar.
Other predicates: 
is_scalar,
predicate-attributes,
predicate-data,
predicate-matrix,
predicate-names,
predicate-numeric,
predicate-trend
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