Compute the convex hull around logtransformed $N$ versus $M$ data.
1  NvMConvexHull(community)

community 
an object of class 
Returns the points and area of the minimum convex hull (a polygon in log10transformed numerical abundance versus log10transformed body mass space) that bounds all the species within the community.
A list
containing the values
nodes 
The names of the nodes that make up the convex hull. 
points 
A matrix containing columns ‘x’ and ‘y’ that contain the coordinates of the points that make up the convex hull. 
area 
The area within the convex hull. 
Lawrence Hudson
Leaper, R. and Raffaelli, D. (1999) Defining the abundance bodysize constraint space: data from a real food web. Ecology Letters 2, 3, 191–199.
Community
, PlotNvM
, chull
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