[igraph] Plotting a signed and directed graph

[Tom Backer Johnsen]

Gentlepersons:

I would like to obtain a plot of a signed and directed graph.  The graph 
is small, 10 nodes or vertices.  Since the graph is directed, I would 
like to have a curved arrow if there are arcs in both directions, with 
continuous leines and dashed for the negative ones. After reading the 
graph (containing -1's zeroes, and +1's) I see that I can plot a 
directed graph using g <- as directed (g) and then plot (g).

Is this possible?

Tom