Finding indices when vectors is used

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Mateusz
Mateusz 2012-2-20
编辑： Matt J 2013-10-17
Assume we have x = [1,2,3,1]; If I execute idx = find(x == 1) then idx == [1,4]. Is there similar command for extracting more indices I am interested in, something like find(x == [1,3]) == [1,3,4].
Of course I would like to avoid loops.
-- Ok, but what if we allow repetitions? For instance: find(x == [1,3,1]) == [1,1,3,4,4] Can we do this without using loops?

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the cyclist
the cyclist 2012-2-20
I think you want the ismember() command.
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Mateusz
Mateusz 2012-2-20
Looks exactly what I am looking for, thanks :)
Mateusz
Mateusz 2012-2-20
Ok, but what if we allow repetitions? For instance: find(x == [1,3,1]) == [1,1,3,4,4] Can we do this without using loops?

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