Re: [igraph] keep vertex positions stable when doing fr plots

[Tamas Nepusz]

Hi Matteo,

> plot.add(self.g, layout="fr", margin=(20,20,20,20), vertex_size=[s *  
> 20 + 7 for s in self.g.vs['size']], seed =  
> self.g.vs['fr_seed_coords'])
>
> but it doesn't work, what am I doing wrong?
The seed= keyword argument isn't passed on to the Fruchterman-Reingold  
layout algorithm if you do it this way. Try to calculate the layout  
separately:

real_layout = self.g.layout("fr", seed = self.g.vs['fr_seed_coords'])
plot.add(self.g, layout=real_layout, ...)

By the way, I checked your code related to the integration of PyGtk  
and igraph for graph plotting. Nice job! In fact, one of the reasons  
why I chose Cairo for plotting was that I knew that it can be  
integrated with GTK somehow, but I never had the time to figure out  
how to do it exactly, so thanks again!

--
Tamas