Example

> cumsum([1,2,3,4,5])
        1          3          6         10         15  
> cumsum([1,2,3,4]')
        1  
        3  
        6  
       10  
> c = [1,2,3; 4,5,6; 7,8,9; 10, -3.4, 2.09]
 c =
        1          2          3  
        4          5          6  
        7          8          9  
       10       -3.4       2.09  
> cumsum(c)
        1          2          3  
        5          7          9  
       12         15         18  
       22       11.6       20.1