hutan is a package for tree manipulation.
To calculate the zero constraint tree (Susko 2014), for example:
library(hutan) library(ape) data( siphonophore_ml ) plot( siphonophore_ml ) data( siphonophore_constraint ) plot( siphonophore_constraint ) zc <- zero_constrained( siphonophore_ml, siphonophore_constraint ) plot( zc )
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