Return node ids for connecting ids
to kids.
Examples
tree <- randTree(10)
# get all nodes to tip for all nodes
getNdsPtids(tree, ids = tree["nds"])
#> $n1
#> [1] "n2" "n3" "n4" "n5" "n6" "n7" "n8" "n9" "t1" "t2" "t3" "t4"
#> [13] "t5" "t6" "t7" "t8" "t9" "t10"
#>
#> $n2
#> [1] "n3" "n4" "n6" "n7" "n9" "t1" "t4" "t5" "t7" "t8" "t9" "t10"
#>
#> $n3
#> [1] "n4" "t5" "t8" "t9"
#>
#> $n4
#> [1] "t5" "t9"
#>
#> $n5
#> [1] "n8" "t2" "t3" "t6"
#>
#> $n6
#> [1] "n7" "n9" "t1" "t4" "t7" "t10"
#>
#> $n7
#> [1] "t1" "t4"
#>
#> $n8
#> [1] "t2" "t3"
#>
#> $n9
#> [1] "t7" "t10"
#>