Example

> a = [ 0,3,4,4,0]
 a =
        0          3          4          4          0  
> any(a)
        1  
> b = [0,0,0]
 b =
        0          0          0  
> any(b)
        0  
> c = [a;b,6,0]
 c =
        0          3          4          4          0  
        0          0          0          6          0  
> any(c)
        0          1          1          1          0  
> any(any(c))
        1