writeAncestors(tree, Anc=NULL, file="", digits=6, format=c("phylip","nexus"), ...)"phylo" or "multiPhylo"."phylip") or Nexus format.x: a vector of character values, in which case ancestral states are estimated internally using fastAnc; and CI: a logical value indicating whether or not to estimate 95-percent confidenace, fastAnc, write.tree