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How to vectorize the following code?

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pietro
pietro 2014-6-1
回答： dpb 2014-6-1
Hi all,
How can I vectorize the following code?
a=struct('cycles',[])
a(1).cycles=[rand(15,20];
a(2).cycles=[rand(15,20];
a(3).cycles=[rand(15,20];
for i=1:length(a)
totalnum(i)=sum(a(i).cycles)
end
Where totalnum should be a [3,20] array.
Thanks
cheers

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dpb
dpb 2014-6-1
reshape(sum([a.cycles]),length(a),[]).'

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