Section: Array Generation and Manipulations
iscellstr
is
x = iscellstr(y)
and it returns a logical 1 if the argument is a cell array in which every cell is a character array (or is empty), and a logical 0 otherwise.
--> A = {'Hello','Yellow';'Mellow','Othello'} A = <cell array> - size: [2 2] Columns 1 to 2 Hello Yellow Mellow Othello --> iscellstr(A) ans = <logical> - size: [1 1] 1