Basic Vector Manipulation

Hi

I have 2 vectors

A=[8,4,5,2,4,6,4,8];

K=[1,3,5,1]

I want to create a third vector like this:

C(1)=sum(A(1))

C(2)=sum(A(1:3))

C(3)=sum(A(1:5))

C(4)=sum(A(1))

Without using a for loop ( this is an example, the vectors I have are larger )

Thanks

Shani

Answer 1

[Daniel Shub]

There might be faster ways depending on K.

    A = [8,4,5,2,4,6,4,8];
    K = [1,3,5,1]
    x = cumsum(A);
    x(k)

[Oleg Komarov]

One simple mod:

x = cumsum(A(1:max(K)));