Example

> ones(2,5)
        1          1          1          1          1  
        1          1          1          1          1  
> ones([2,4])
        1          1          1          1  
        1          1          1          1  
> d = 1:3:0.5;
> c = 1:5;
> b = [c;d]
 b =
        1          2          3          4          5  
        1        1.5          2        2.5          3  
> a = ones(size(b))
 a =
        1          1          1          1          1  
        1          1          1          1          1  
> ones([2,4])