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The how and why of branch support and partitioned branch support, with a new index to assess partition incongruence
Author(s) -
Brower Andrew V. Z.
Publication year - 2006
Publication title -
cladistics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.323
H-Index - 92
eISSN - 1096-0031
pISSN - 0748-3007
DOI - 10.1111/j.1096-0031.2006.00113.x
Subject(s) - conventional pci , partition (number theory) , congruence (geometry) , index (typography) , mathematics , combinatorics , computer science , medicine , geometry , myocardial infarction , world wide web
An introduction and step‐by‐step guide to the calculation of branch support (BS) and partitioned branch support (PBS) is provided, along with a new summary measure of conflict among data partitions, the partition congruence index (PCI). Patterns of PCI vs. BS are compared for two data matrices from butterflies. PCI is a close mirror of BS unless BY is relatively low and there is a lot of conflict among data partitions, in which case PCI becomes negative. Some theoretical concerns relating to PBS are noted. © The Willi Hennig Society 2006.