Sum up parts of a vector?

Dear all,

I have a 105120*1 vector and I want to sum up in steps of 288. So I want to have the sum of the first 288 elements, then the sum of the next 288 elements and so, until the end of the vector. So finally I want to have a new vector of the dimension 365*1. So I need finally 365 sums. How can I do that?

Answer 1

[Azzi Abdelmalek]

x=rand(105120,1);
out=sum(reshape(x,288,[]))'

[Thor]

Great! Thank you!

Answer 2

[Wayne King]

Something like

    k = 1;
    stepsize = 288;
    for nn = 1:288:105210-stepsize
      partsum(k) = sum(vekt(nn:nn+stepsize-1));
      k = k+1;
    end

That's one possible way. There are many others.

[Thor]

Great too! Thank you!