How do I get the convex hull of a set of neighboring points?

I used the delaunayTriangulation function then extracted a set of neighboring points called 'neighbors'. Now I want to find the convex hull of those points, k=convexhull(neighbors) doesn't work neither does k=convexhull(DT(neighbors)).

Answer 1

[Walter Roberson]

How did you extract the neighbors? Is it a list of vertexIDs such as from

   vertexId = nearestNeighbor(DT, 211.6, -48.15);

If so then convexhell(DT.Points(neighbors,:))