Get root taxa
Return the root taxa for a
taxmap object. Can also be used to get the roots of
a subset of taxa.
roots(obj, subset = NULL, index = FALSE)
taxmapobject containing taxon information to be queried.
character) Taxon IDs for which supertaxa will be returned. Default: All taxon in
objwill be used.
TRUE, return the indexes of roots in
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