create from a vector a vector of cumulative sums

Consider a vector

[e1, e2, e3, e4,...]

I want to create a vector

[e1, e1+e2, e1+e2+e3,...]

Is there any simpler way rather than writing a loop?

Answer 1

[KSSV]

Read about cumsum.

A = rand(10,1) ;
iwant = cumsum(A)

Answer 2

[Alan Stevens]

cumsum does exactly that. For example:

>> x = [1 3 5 7 9];

>> cumsum(x)

ans =

1 4 9 16 25