Cloud of points Convex Hull

How do I get a function "getConvexHull(x,y)" that returns the indices of the points that lay on the convex hull of the cloud, defined by a list of x- and y-coordinates x and y, where both input arrays have length n, with n ≥ 3?

Answer 1

[Matt J]

See convhull or convhulln

https://www.mathworks.com/help/matlab/ref/convhull.html

https://www.mathworks.com/help/matlab/ref/convhulln.html

[Catalytic Kys]

Thanks, but it should be done with code not with another function.

I want to create my own function to get these points for more flexibility.

[Matt J]

Because it is a homework assignment?

[Image Analyst]

"I want to create my own function" -- OK, we'll leave it to you.