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Given the coordinates of a convex hull (i.e. a polygon), this function calculates its area. Not intended for direct use outside of siberConvexhull().
siberConvexhull()
hullArea(x, y)
a scalar representing the area of the convex hull in units of x * y; i.e. most commonly in permille squared for isotope data.
x * y
a vector of x-axis data
a vector of y-axis data