[igraph] Faithful distances in weighted plots?

[Evan Alymers]

For laying out a weighted network, the simplest test case seems like a (very) isosceles triangle. However, when I plot this, sometimes it looks isosceles and sometimes it looks equilateral. Is there a better layout to use?

Thank you

s = matrix(0, nrow=3, ncol=3)

s[1,2] = 0.2

s[1,3] = 0.2

s[2,3] = 20

s = s + t(s)

g = graph.adjacency(s, mode="undirected", weighted=TRUE, diag=FALSE)

plot(g)

l = layout.drl(g, weights=E(g)$weight)

plot(g, layout=l)