Calculates the maximum width divided by the maximum depth.
Arguments
- phy
phylogeny or ltable
References
C. Colijn and J. Gardy. Phylogenetic tree shapes resolve disease
transmission patterns. Evolution, Medicine, and Public Health,
2014(1):96-108, 2014. ISSN 2050-6201. doi: 10.1093/emph/eou018.