as.phylo.formula (short form
builds a phylogenetic tree (an object of class
a set of nested taxonomic variables.
a right-side formula describing the taxonomic relationship:
the data.frame where to look for the variables (default to user's workspace).
a logical value specifying whether to collapse single nodes in the returned tree (see details).
further arguments to be passed from other methods.
Taxonomic variables must be nested and passed in the correct order:
the higher clade must be on the left of the formula, for instance
~Order/Family/Genus/Species. In most cases, the resulting tree
will be unresolved and will contain polytomies.
collapse = FALSE has for effect to add single nodes
in the tree when a given higher level has only one element in the
level below (e.g., a monospecific genus); see the example below.
an object of class
Julien Dutheil email@example.com, Eric Marcon and Klaus Schliep
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