Re: [igraph] using the Graph.layout_drl function

[Gábor Csárdi]

On Tue, Nov 24, 2009 at 1:09 PM, Tamas Nepusz <address@hidden> wrote:
> Hi Kurt,
>
>> I've just recently been playing with the python igraph interface.  I
>> want to do a graph layout on a network w/ about 70k nodes.  The layout
>> algorithm seems to complete.  But the layout has a massive vertical
>> line of nodes in the middle.  That is, many nodes seems to retain an
>> "x" value of near zero in the layout.
>>
>> Is this normal?  Is there an easy fix?  Is there more info on the DrL 
>> algorithm?
> I don't know whether it's normal or not; it might have happened that
> there are a few nodes that are connected only very loosely to the rest
> of the network and these were placed very far from the Y axis,
> effectively squeezing the rest of the network into the area close to the
> Y axis. I'm not sure. If I were you, I would try the original DrL
> implementation and read its documentation as well (I think it's in the
> downloadable source code package):
>
> http://www.cs.sandia.gov/~smartin/software.html

Another explanation is that DrL is not working well for unconnected
graphs. At least not with the default parameters.

Gabor

> --
> Tamas
>
>
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-- 
Gabor Csardi <address@hidden>     UNIL DGM