Odd numbered elements problem

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Zaki
Zaki 2013-10-3
评论： AbdElrahman Mahran 2020-4-11
I have problem about Matlab. There is one question about odd numbered elements. Can you help me to solve that my problem?
This is the question :
Write a function which every other element of the vector passed in. That is, it returns the all odd numbered elements, starting with the first.
Examples :
input x = [1 3 2 4 3 5]
output y is [1 2 3]
and
input x = [5 9 3 2 2 0 -1]
output y is [5 3 2 -1]
Thanks

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回答（2 个）

Alejandro Ayala
Alejandro Ayala 2019-11-5
function y = every0ther(x)
y = x(1:2:end);
end
Hope this helps!
danny
danny 2013-10-3
you can probably use a loop
e.g. k=1; for n = 1:length(x), if mod(n,2)==1, y(k) = x(n); k =k+1; end; end
or
just build an odd index e.g. i = [ 1 3 5 7....]; then use x(i) to get your odd outputs.
there are many other ways, indexes and loops are all i can think of atm.

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