
From:  Piotr Wojciechowski 
Subject:  [igraph] node overlapping in simplified network graph 
Date:  Wed, 10 May 2017 11:44:10 +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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