Re: [igraph] adding rownames in line.graph

[Tamas Nepusz]

> The catch is i am not sure the row order in the linegraph is the same
> as that in the edgelist.
It is the same, although the documentation does not say it explicitly. I
think you can reasonably expect it to stay this way; I see no reason why it
should be changed. We will add it to the documentation in the next version
so we don't break this contract accidentally.

Best,
Tamas