
species_combo(m = matrix(rbinom(100, 1, 0.5), nrow = 10))
Pielou, D.P. and E.C. Pielou. 1968. Association among species of infrequent occurrence: the insect and spider fauna of Polyporus betulinus (Bulliard) Fries. Journal of Theoretical Biology 21: 202-216.
obsCombo <- species_combo(m=matrix(rbinom(100,1,0.5),nrow=10))
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