Implementation with Scipy ConvexHull

[zimshady]

I am trying to place a bounding polygon/surface around my plotted data points. I have tried to implement this using ConvexHull from the scipy package but I am running into trouble. Any ideas or suggestions for implementing something like this? I have found a simple example below (assume that the polygons form around the outermost data points for each dataset.

[marcharper]

My advice would be to determine the points of the polygon, project them with ternary, and then use matplotlib to draw the polygon directly on the ternary figure.