out = istable (x) ¶True if input is a table array or other table-like type, false
otherwise.
Respects istable override methods on user-defined classes, even if
they do not inherit from table or were known to Tablicious at
authoring time.
User-defined classes should only override istable to return true if
they conform to the table public interface. That interface is not
well-defined or documented yet, so maybe you don’t want to do that yet.
Returns a scalar logical.