How can I detect a data point inside / outside a non-convex hull in high dimensional data set?

Dear all, My question is: How can I detect a data point inside / outside a non-convex hull in high dimensional data set? There exist 3 MATLAB functions I found: "inpolyhedron", "pinpolyhedron" they are working up to 3D only, and "inhull" work with high dimensions but with convex hull only. Please, is there any other MATLAB function work with non-convex hull in high dimensional data set?

Regards Ammar

[KSSV]

How about inploygon?

[John D'Errico]

Have you asked me this question before?

How high of a dimension do you need?

[Ammar]

Dear KSSV, Thank you for your comment. In fact, I used "inpolygon", unfortunately, it works just with 2D. Please, if you have any idea about more than 3D and non-convex hull it will help me. My data sets are 2D, 4D, and 38D.

Thanks s lot Ammar

[Ammar]

Dear John D'Errico, I would like to thank you for your comment. I have three data sets 2D, 4D, and 38D and they form a non-convex hull and I am looking to test whether a new data point inside/outside that figure.

Kind regards Ammar

[Mojtaba Houballah]

Have you figured out the answer to do that in 4D?

Thank you

Mojtaba