MATLAB: Create from a vector a vector of cumulative sums

Question

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

Read about cumsum.

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