Sum up parts of a vector?

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Thor
Thor 2013-1-24
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?

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Azzi Abdelmalek
Azzi Abdelmalek 2013-1-24
编辑：Azzi Abdelmalek 2013-1-24
x=rand(105120,1);
out=sum(reshape(x,288,[]))'

更多回答（1 个）

Wayne King
Wayne King 2013-1-24
编辑：Wayne King 2013-1-24
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.

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