Converts a phylogenetic tree of class "phylo" to a format
usable as a guide tree by MAFFT. This function is called internally by
mafft.
phylo2mafft(phy, file)A phylogenetic tree of class phylo.
A character string giving a filename. May be missing, in which case the results are only printed on the screen.
A matrix coding the MAFFT-formatted tree, as a side effect the same
matrix is written to file.
The MAFFT website: http://mafft.cbrc.jp/alignment/software/index.html
mafft for an interface to MAFFT.