Re: [igraph] combining GIS and igraph

[Stephan Schlögl]

Hi Manuel,
I'm not sure if I understand you right, but I think in ggplot2 it's quite easy to combine poligons with for example dots and lines between them.
Here is an example of a map with nodes and edges on it.
http://supersambo.schloegl.net/stuff/europe_relations.pdf
Its a network of locations of twitter users and follower relationships between them. Size is based on the number of users in a certain location, Color is a result of the community detection algorithm I ran on the network and the thickness should represent the weight of edges. The plot is a combination of geom_polygon() for the map geom_text() for the "nodes" and geom_segment() for edges.

Please do not comment on this plot in particular :). I know you can't read hardly anything out of this but it's just a first attempt and I was wondering if you were looking for something like this

Best,
stephan

On 27.06.2014 14:03, Manuel Herrera Fernandez wrote:

Hi everybody!

I'm working with an igraph network (in R) with coordinates corresponding to real data. The next stage of my analysis should be combine that igraph network with a GIS polygon. I already captured GIS into R by a number of methods (by using sp and maptools or rgdal etc.) but any of them allow to me combining these two plots into one.

I'd appreciate very much if you share with me possible ideas to handle this part of my work.

Thanks in advance,

Manuel

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Manuel Herrera Fernandez
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Dept. of Civil and Environmental Engineering
South Kensington Campus - Imperial College London
SW7 2BU London, United Kingdom

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Web: http://www.imperial.ac.uk/people/a.herrera-fernandez

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Mag. Stephan Schlögl
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