Re: [igraph] tkplot() - error message

[Diana Neufeld]

Dear Tamas, dear all,


thanks for your answer.
My matrix contains PubMedID’s in the first column and the ArticleDate in the 
second.
So what I want is to get a graphic with a y-axis and vertices depends on time 
(ArticleDate).
The additional information I have: publications and their references (data 
frame with two columns). 
How can I use this time-information to get a graph, whose vertices are not 
randomly placed on a 
window opened by tkplot().
And if I rename my PubMedID’s in short notations, so it could work?

Thanks, Di.






> -----Ursprüngliche Nachricht-----
> Von: "Tamas Nepusz" <address@hidden>
> Gesendet: 23.09.09 16:14:46
> An: Help for igraph users <address@hidden>
> Betreff: Re: [igraph] tkplot() - error message


> Dear Diana,
> 
> > > tkplot(graph , layout=pub.mat)
> > [..]
> > pub.mat  is a matrix with two columns like this:
> > 
> >    pubMedID ArticleDate
> > 12    53631           11
> > 15   475066          14
> The layout() argument of tkplot needs a graph layout; it is a matrix
> with N rows and two columns, the first column containing the X
> coordinate of the node on the plot, the second column containing the Y
> coordinate. Your matrix does not look like a valid layout. igraph
> tries to interpret it as a layout, so the PubMed IDs will be treated as
> X coordinates, but they are too large.
> What you will have to do is:
> 
> Either call tkplot() without the layout= option and set a layout from
> the menu of the window opened by tkplot() -- you can also rearrange the
> nodes by the mouse if you don't like the layout generated by igraph.
> Alternatively, you can pre-calculate a layout using igraph's various
> layout methods and pass the matrix obtained from the layout function. An
> example:
> 
> layout <- layout.fruchterman.reingold(graph)
> tkplot(graph, layout=layout)
> 
> Best,
> -- 
> Tamas
> 
> 
> _______________________________________________
> igraph-help mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/igraph-help
> 


________________________________________________________________
Neu: WEB.DE Doppel-FLAT mit Internet-Flatrate + Telefon-Flatrate
für nur 19,99 Euro/mtl.!* http://produkte.web.de/go/02/