
From:  Tamas Nepusz 
Subject:  Re: [igraph] node overlapping in simplified network graph 
Date:  Wed, 10 May 2017 23:15:30 +0200 
Dear igraph developers,
I’m relatively new user of R and igraph, so please excuse me if my question is naive. I found igraph very useful in my work however I experienced a problem with plotting the graph, which I cannot overcome easily.
I worked on following vertex vector:
g1 < graph ( edges=c(
1, 12,
1, 10,
1, 9,
9, 2,
9, 2,
1, 3,
1, 4,
9, 8,
1, 6,
9, 5,
1, 6,
1, 7,
1, 7,
1, 9,
9, 11,
9, 11,
1, 5,
1, 13,
1, 13), n=13, directed=T)
Then Iafter simplification I received following graph (see below). The problem is that on this graph I cannot distinguish 9>5 and 1>5 from 1>9, since they are overlapping each other (see below). From the graphical point of view problem solves when I reverse one of two 1>9 nodes to 9>1, however in my case directions are crucial. Is there a simple method to improve this graph without manipulation in the data vector?
g2 <simplify (g1)plot
Thank you in advance,
Piotr Wojciechowski
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