array element sum wih condition

Hello,guys and girls, i have a situation:

 F=[5, 4, 3, 2, 1];

I would like to sum matrix elements in order like this:

 5
 5+4
 5+4+3
 5+4+3+2
 5+4+3+2+1

Do you have any ideas?

Answer 1

[per isakson]

Try the function, CUMSUM