Given a set of cartesian coordinates, this function approximates the sphericity of the set by calculating the bivariate 95 ellipse of the set.
A vector of x coordinates.
A vector of y coordinates.
A single numeric value corresponding to the ratio between the minor and major axis of the bivariate 95 close to 1 indicates that the set is approximately circular; a value close to 0 indicates that the set is strongly elongated.
Simon Garnier, [email protected]
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