[igraph] Multiple edges plot - R interface

[Jeronimo Carballo]

Hello list,

I am a newbie in igraph and I need to plot a network with multiple edges
between vertices. It is possible with igraph?

I tried the following code,

g1 <- graph( c( 0,1, 1,2, 2,2, 2,3, 2,3 ), directed = TRUE )
plot(g1)

and I got only one edge for pair of vertices.

Thanks very much,

Jeronimo Carballo