How to vectorize the following code?

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

[Azzi Abdelmalek]

What is a?

[pietro]

You're on right, I have just edited the question. thanks

Answer 1

[dpb]

   reshape(sum([a.cycles]),length(a),[]).'