# How can I find the data point inside/outside the polyhedron shape ? i.e. more than 3D.

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Ammar 2017년 1월 13일
댓글: Ammar 2017년 1월 14일
Dear all, I would like to ask a question: How can I find the data point inside/outside the polyhedron shape? i.e. the shape in more than 3D dimensions. I know the function "inpolygon" in MATLAB give us the result if the data point inside/outside polygon in 2D and 3D, but what about more than 3D?
Kind regards Ammar
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John Chilleri 2017년 1월 13일
Depending on your polyhedron, it might work if you were to run inpolygon on all the profiles and whichever points lie in all are within the polygon.

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### 답변 (2개)

the cyclist 2017년 1월 13일
I cannot endorse it myself (because I have never used it), but you could try the in_polyhedron function from the File Exchange.
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Ammar 2017년 1월 13일
Dear "the cyclst", I would like to thank you for this answer. Please, I tried to use this function but depend on my understanding it is work just for 3D and I am looking for a function work with more than 3D, i.e. 4, 5,... dimensions. Regards

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Matt J 2017년 1월 13일
If it is a convex polyhedron, you can use INHULL.
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Image Analyst 2017년 1월 14일
You also have answers in your duplicate question. Now you have TWO places to look. I don't know why you want that situation. Don't forget to check both threads from now on.
Ammar 2017년 1월 14일
Dear Image Analyst, thank you very much for this comment. Yes, I just want to make the question more simple. I am looking for a function in MATLAB to find the point inside/outside the polygon in high dimensions (i.e. more than3D). Thanks.

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