Dears, I'm studying the structure of phylo object to work it in my functions. I'm using read.newick to read tree with singletons. I do not know why the number of node is not equal to length of node.labels. For instance:
I have this tree (the same annexed): tree<-read.newick(text='((((((a))A),(((b),(b1)))B)))C;') tree$Nnode [1] 10 tree$tip.label [1] "a" "b" "b1" tree$node.label [1] "C" "" "" "" "A" "" "B" length(tree$node.label) [1] 7 Why nodes 11, 12 and 13 not have labels, even if it is "", in tree$node.lable, but node 9 has? Best regards, Mario
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