Summing elements of a vector sequentially?

Is there a function that will sum a vector in the following way?

Let x be a 1 x N vector. The ith element of the output vector should be sum(x(1:i)), where i ranges from 1 to N.

I will use a for loop, if I must...

x = 1:100;
output = zeros(1,length(x))
for i = 1:length(x), output(i) = sum(x(1:i)); end

Thanks!

Answer 1

[per isakson]

See cumsum

[James]

I had a feeling there would be a function dedicated to this. Thanks!