Calculates the number of fourtaxon subtrees consistent with a pair of cladograms, calculating the symmetric quartet distance of Bandelt & Dress (1986), Reconstructing the shape of a tree from observed dissimilarity data, Advances in Applied Mathematics, 7, 309343 <doi:10.1016/01968858(86)900382>, and using the tqDist algorithm of Sand et al. (2014), tqDist: a library for computing the quartet and triplet distances between binary or general trees, Bioinformatics, 30, 2079–2080 <doi:10.1093/bioinformatics/btu157> for pairs of bifurcating trees.
Package details 


Author  Martin R. Smith [aut, cre, cph] (<https://orcid.org/0000000156601727>), Andreas Sand [ant], Gerth Stølting Brodal [ant], Rolf Fagerberg [ant], Thomas Mailund [ant], Christian N. S. Pedersen [ant], Jens Johansen [ant], Morten K. Holt [ant] 
Maintainer  Martin R. Smith <[email protected]> 
License  GPL (>= 2) 
Version  1.0.2 
URL  https://github.com/ms609/Quartet 
Package repository  View on CRAN 
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