Determine if specified identifier is valid
tf = H5I.is_valid(obj_id)
tf = H5I.is_valid(obj_id) determines whether
the identifier obj_id is valid.
fapl = H5P.create('H5P_FILE_ACCESS'); H5P.close(fapl); if H5I.is_valid(fapl); fprintf('File access property list is valid.\n'); else fprintf('File access property list is not valid.\n'); end