How to pick randomly elements from a vector without repetation?

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IBM watson
IBM watson 2018-10-22
编辑： Bruno Luong 2018-10-22
If I have a vector like this :
a=[1 2 3 4 5]
i know how to do this but my vector is something like:
a=[23 46 4 2 5]
I should pick 2 elements randomly without repetation.

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采纳的回答

Bruno Luong
Bruno Luong 2018-10-22
编辑：Bruno Luong 2018-10-22
a(randperm(length(a),2))

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