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

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?

Answer 1

[Chunru]

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