Stability of SARS-CoV-2 phylogenies
Fig 9
Entropy-weighted distance statistic.
(A) Example trees (T and T’) for this comparison with identical sets of leaves but different topologies. Internal branches are labelled in red. (B) The split distance statistic for each T node (see Methods for notation). Split distance of each T split (branch) from all T’ splits plus a “garbage node” (ɸ) containing a null set of leaves, with the matching split distance and its corresponding T’ split (branch) for each T split (branch) highlighted in red. Multiple T’ splits can match a T split but the garbage node is given precedence (as is the case in T branch 4). (C) Table showing the entropy, best-matching T’ branch(es), matching split distance and entropy-weighted matching split distance for each branch in T, as well as the entropy-weighted total distance D(T,T’) between T and T’.