| FreeMat
    | 
Section: Inspection Functions
The syntax for iscell is 
x = iscell(y)
and it returns a logical 1 if the argument is a cell array and a logical 0 otherwise.
Here are some examples of iscell
--> iscell('foo')
ans = 
 0 
--> iscell(2)
ans = 
 0 
--> iscell({1,2,3})
ans = 
 1