Once a tip has been added to the tree, print the newick-formatted subtree to which the tip was added.
Examples
mrca_list <- c("Ursus_arctos", "Ursus_spelaeus", "Ursus_americanus")
tree <- text_placr(tree, mrca_df)
#> Placing tip Kretzoiarctos_beatrix
#> via relatives Indarctos_arctoides, Indarctos_vireti
#> at node 25
#> Placing tip Ursus_abstrusus
#> via relatives Ursus_arctos, Ursus_spelaeus, Ursus_americanus
#> at node 30
echo_sub <- echo_subtree(tree, mrca_list, "Ursus_abstrusus")