Balance metric (in the case of a binary tree), which measures
the sum across all internal nodes of one over the maximum depth of all
attached tips to that node.
Although also defined on non-binary trees, the treestats package only
provides code for binary trees.
Usage
b1(phy, normalization = "none")
Arguments
- phy
phylo object or ltable
- normalization
"none" or "tips", in which case the resulting
statistic is divided by the number of tips in the tree, as a crude way of
normalization.
References
K.-T. Shao and R. R. Sokal. Tree Balance.
Systematic Zoology, 39(3):266, 1990. doi: 10.2307/2992186.