how to add 2 to some of array's elements?

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zeezo
zeezo 2018-3-19
评论： zeezo 2018-3-19
I have this array and I would like to add 2 to the elements starting from the third one
a=[1;6;9;8;3;6;8;2;1;5;4;7;6;99;5;4]
so I want to add 2 to 9,8 and 3 up to the end only.

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James Tursa
James Tursa 2018-3-19
编辑：James Tursa 2018-3-19
a(3:end) = a(3:end) + 2;

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