Extracting elements from a/an vector/array with a specific order

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Jefferson Wang
Jefferson Wang 2019-8-30
编辑： madhan ravi 2019-8-30
So assume I have a vector/array A1 of size 100 and I want to extract every third elements in A1 and form a new array that contains the 1st, 4th, 7th, 10th, 13th, and so on till the 100th element of A1. Is there a function that enables me to do that?

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madhan ravi
madhan ravi 2019-8-30
编辑：madhan ravi 2019-8-30

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