Gephi forums

Re: parallel edges

2011-10-05T01:40:25+01:00

But what if I need to filter the graph by edge attributes? How can I do this?

Statistics:Posted by mcanally — 05 Oct 2011 01:40

Re: parallel edges

2011-05-24T22:37:02+01:00

admin wrote:Great!

Here the French translation:
Les attributs sont ignorés si un lien est déjà présent, mais leurs poids sont additionnés (poids=1 par défaut).

Thanks!

Eduardo

Statistics:Posted by eduramiba — 24 May 2011 22:37

Re: parallel edges

2011-05-24T21:15:43+01:00

Great!

Here the French translation:

Les attributs sont ignorés si un lien est déjà présent, mais leurs poids sont additionnés (poids=1 par défaut).

Statistics:Posted by admin — 24 May 2011 21:15

Re: parallel edges

2011-05-24T20:19:13+01:00

Hi,
Now Import Spreadsheet sums weights for parallel edges (specified weight or 1 if not specified)

I changed the warning text, and would need a french translation for "If an edge already exists, attributes will be ignored, but their weights will be added (weight=1 if not specified)"

Eduardo

Statistics:Posted by eduramiba — 24 May 2011 20:19

Re: parallel edges

2011-05-20T09:47:34+01:00

Ah damn it, when I use the "Import Spreadsheet" in the Data Lab, it only imports the first edge, the others are ignored. Imagine an edge list:

CODE:

"ID""Source""Target""AnAttribute"012attrvalue0112attrvalue1

Only the first edge will be imported, the second is ignored. Sorry for my mistake.

In a case of parallel edges, I suggest to warn the user and make the "Import Spreadsheet" to behave like the CSV File Importer do by summing the weights if possible, and leave blank the other attributes. I open a bug.

Statistics:Posted by admin — 20 May 2011 09:47

Re: parallel edges

2011-05-19T22:20:06+01:00

Not sure I understand, can you explain or show some of your data?

Statistics:Posted by mbastian — 19 May 2011 22:20

Re: parallel edges

2011-05-19T16:57:44+01:00

No because I would want to merge rows, not columns, and there is no way to merge either nodes or edges in Gephi

Statistics:Posted by admin — 19 May 2011 16:57

Re: parallel edges

2011-05-19T16:32:40+01:00

Yeah, but you can already do that with merge, no?

Go to Merge Columns, pick your weights columns and take the SUM operator?

Statistics:Posted by mbastian — 19 May 2011 16:32

Re: parallel edges

2011-05-19T13:50:38+01:00

I have the opposite issue:

I import an edge list, edges having different attributes hence they are not merged, which is good. But in the Overview I'd like to see the thickness of the edges proportional to the sum of the edge weights it represent, like meta-edges.

Is it something we could implement?

Or does it make sense to add a way to group edges and not only nodes in the Data Lab?

Statistics:Posted by admin — 19 May 2011 13:50

Re: parallel edges

2011-05-04T17:58:37+01:00

Just for this one. I checked with previous graphs and weights were correctly displayed (regardless of the presence of parallel edges or not).

I re-opened the problematic graph and got the following error : "the project file couldn't be opened. Please check the file has .gephi extension. IllegalArgumentException - the value column doesn't exist".

Actually it opens anyway,, diplaying edges... Thus I can work on it, but this is weird!

Statistics:Posted by weedlili — 04 May 2011 17:58

Re: parallel edges

2011-05-04T16:03:10+01:00

Is there a way that Gephi ignore parallel edges? I would prevent it from increasing the edge's weight during the import when parallel edges are found.

Yes by default it merges the edge weight.

Unfortunately I cannot see the column "weight" in the Edges list, even if all attributes columns that can be shown are ticked.

That is weird, is that for all graphs or just this one?

Statistics:Posted by mbastian — 04 May 2011 16:03

Re: parallel edges

2011-05-04T09:59:43+01:00

Unfortunately I cannot see the column "weight" in the Edges list, even if all attributes columns that can be shown are ticked.
Weight is nevertheless displayed when I edit an edge.

Statistics:Posted by weedlili — 04 May 2011 09:59

Re: parallel edges

2011-05-04T09:19:33+01:00

No,

But you can set edge weight to 1 in the Data Laboratory. In Edges > Fill Column with a value (on the bottom) > Weight

Statistics:Posted by admin — 04 May 2011 09:19

[SOLVED] parallel edges

2011-05-04T08:30:04+01:00

Hello,

Is there a way that Gephi ignore parallel edges? I would prevent it from increasing the edge's weight during the import when parallel edges are found.

Thanks !

W.

Statistics:Posted by weedlili — 04 May 2011 08:30