Re: [igraph] Faithful distances in weighted plots?

[Gábor Csárdi]

I guess this is because igraph rescales the coordinates to c(-1,1), both vertically and horizontally, so if the short (=high weight) edge happens to be close to vertical/horizontal, then it is rescaled, and will get longer.

You can use the raw coordinates to avoid this, i.e. plot(..., rescale=FALSE).

Gabor

On Sat, May 18, 2013 at 5:58 PM, Evan Alymers <address@hidden> wrote:

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)

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Gabor Csardi <address@hidden>     MTA KFKI RMKI