The \(\alpha^*\) value
as defined in Gruson (2020).
Arguments
coords
coordinates of the points for which you want to compute the
alphashape
References
Gruson H. (2020). Estimation of colour volumes as concave hypervolumes using
\(\alpha\)-shapes. Methods in Ecology and Evolution, 11(8), 955-963
tools:::Rd_expr_doi("10.1111/2041-210X.13398")