select only one value every four (or different numbers) in an array

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SYML2nd
SYML2nd on 29 Nov 2021
Answered: Chunru on 29 Nov 2021
Hi,
I would like to select only one value every four in an array. For instance, given an array [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16], I obtain
[4 8 12 16]. Are there simple commands to do this?

Accepted Answer

Chunru
Chunru on 29 Nov 2021
a = [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16]
a = 1×16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
b = a(4:4:16)
b = 1×4
4 8 12 16

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