Fast 2D Convex Hull function

[V,I] = ConvexHull(InputData) gives the convex hull for a 2D points set.
InputInputData is a coordinate matrix of size Nx2. The first column contains the xInputData and the second column contains the yInputData :

InputData = [xInputData' yInputData']

[V,I] = ConvexHull(InputData) provides two types of elements :
V : The x-InputData and y-InputData values of the founded V
I : The position indexes of the founded V in the initial InputData.

See Demo file for more details.