plotPointsShape function

Add confidence ellipse or convex hull for group of points

plotPointsShape(p, lwd, lty, opacity, shape_function, ...)

Arguments

• p: plot data returned by function mdaplot()
• lwd: thickness of line used to show the hull
• lty: type of line used to show the hull
• opacity: of opacity is larger than 0 a semi-transparent polygon is shown over points
• shape_function: function which calculates and return coordinates of the shape
• ...: extra parameters for shape_function