How to create boundary for cloud of points where data is "convex"?

I have a dataset of 5600 points that I would like to create a boundary to the entire cloud when I scatter (x,y). If done with the boundary(x,y,1) function what I get a lasso that is does not pick enough points, especially where my data becomes a little convex. I'm open to other methods because what I really want is a curve that picks my MAX values as it moves in x, kind of a blanket over my data. This becomes difficult when the gradient between points becomes large.

Additionally, the dataset of course isn't nicely ordered, it's very random.

Answer 1

[Image Analyst]

Does convhull() do what you want?

[Image Analyst]

Related functions are activecontour (demo attached), and envelope().

And what does "gradient between points" mean to you?