Compare 2 arrays with find()

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Rafael Luque
Rafael Luque 2019-8-5
评论： Star Strider 2019-8-5
I have 2 arrays:
x = 1:1:3;
Points = [1 3 2 1 1 3 4];
I would like to use find() function comparing each element of 'Points' array with full 'x' array.
It would be similar to do:
find(Points(1) == x)
find(Points(2) == x)
... one by one, but I would like to do it at once without looping. However I get error if I do:
find(Points == x)

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采纳的回答

Star Strider
Star Strider 2019-8-5
The ismember function may do what you want:
x = 1:1:3;
Points = [1 3 2 1 1 3 4];
[~,Out] = ismember(Points, x)
producing:
Out =
1 3 2 1 1 3 0
Experiment with it to get the result you want.

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