Find the convex hull for a data cloud is very useful. Here is my implementation to find the convex hull in two dimensions with the Jarvis' algorithm.
I invite you to run this code. There are a pair of examples here.
This code is not bug-free, so take care, maybe in the future I update it. Please, if you find a bug and you can correct it do it and help me and some more people.
The language used in the implementation is Julia