MATLAB: Select all points inside a polygon to create a new matrix

Question

Hi, I have a point cloud matrix x,y and I want to create a new matrix with all the points that are inside a polygon to create a new matrix with all the points that are inside a polygon.

Thank you in advance, Martha

Answer 1

Find the convex hull, and then you can use the vertices in poly2mask()

If you want the hull to be non-convex (e.g., to follow the points of a "star") then you have more difficulty in defining "inside".