Compute cumulative sum of a column vector without for loop

For each index of a column vector , I want to compute the sum from index to index+spacing. spacing is an integer.

My aim is not to use for-loop but I didn't manage to find a way to avoid it:

A=(1:10)'; % column vector
spacing  = 4; % scalar
solution = zeros(length(A)-spacing,1);
for index=1:length(A)-win % equals 6 in this example
    solution(index)=sum(A(index:index+spacing));
end

solution =

    15
    20
    25
    30
    35
    40

Thanks for your help!

Aurélien

Answer 1

[the cyclist]

The filter() command is one way:

tmp = filter(ones(1,spacing+1),1,A);
solution = tmp(spacing+1:end)

Answer 2

[C.J. Harris]

A=(1:10)'; % column vector
spacing  = 4; % scalar

solution = arrayfun(@(n) sum(A(n):A(n+spacing)), 1:length(A)-spacing)';