ape phylo object to igraph issues

Question

There is a function within the ape library that can convert an ape phylo obj into an igraph network or a network object (from the R library network).

as.igraph(cur_Tree)

or

as.network(cur_Tree)

I'm having issues with the former:

as.igraph(cur_Tree, directed = FALSE)

Error in graph(unname(ids[t(el)]), directed = directed) : 
At type_indexededgelist.c:117 : cannot create empty graph with negative number of vertices, Invalid value

What's going on? Thanks in advance.

Answer 1

Converting this tree to igraph using as.igraph() will require the following hack:

x$node.label[1] <- " "

This is because the first entry (or wherever) the node.label is == ""