Array indexing nth spaced element

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Raquel Flores
Raquel Flores 2020-3-2
回答： Adam 2020-3-2
How do I extract the nth spaced elements of an array?
a = [1 2 3 4 5 6 7 8 9 10 11 12]
I want to extract a(1), a(1+n), a(1+2n),... elements.
My array is quite long, so writing the above manually is not an option.
Is there a way of doing so without using a for loop?

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Adam
Adam 2020-3-2
a( 1:n:end )

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