[seqfan] Visualization via Gephi and gexf.js

[Eric]

Hello SeqFan,

The OEIS database is an inexhaustible source of potential nodes and edges
visualizations.
>From an overview to a very targeted analysis, especially as some of us,
don't have access to all data in .zip file form, like crossrefs between
sequences.

Images created with software like Circos [ http://circos.ca/ ] have appeared
in a variety of scientific, general and book publications, such as Wired,
New York Times, Conde Nast Portfolio, and American Scientist.

More than a "simple" encyclopedia, the analysis possibilities are endless,
perhaps to the point of feeling overwhelmed.

http://www.visualcomplexity.com/vc/
http://vimeo.com/5091290
Manuel Lima

Let me, if I may, present a first brief personnal exploration of the
possibilities :

Through the Gephi's interface [ https://gephi.org/ ] , algorithms such as
"Force Atlas 1&2" can allocate nodes on the surface, nodes and edges can be
colored, shortest road between two nodes, edge weight...etc etc

Import .csv (Excel) or openoffice... use the CONCATENATE function to
generate de node xml...

And the complete final map can be exported in .png or .pdf for example.

Even more, all the parameters of the visualization can be exported in GEXF
format,

to transform our static map into web interactive map with the GEXF.js
package.
[ https://github.com/raphv/gexf-js ] [see sigma.js too http://sigmajs.org/ ]


I'm having fun already regularly to process OEIS data
(http://oeis.org/stripped.gz and http://oeis.org/names.gz) via mysql. Just
for personnal access on the server :

http://s253639974.onlinehome.fr/oeisdatabase/ (be patient with the possible
buggy screen display...and say "yes" to allow process)

For example, if i do a research on "Fibonacci" inside "Seqaname" field i
have the list of corresponding sequences and the total records: 3207 ...
this number could be one parameter to define the size of a "Fibonacci" node
and 3207 edges pointing the sequences cloud.

Why not a periodic table of elements of a new kind particularly suitable for
crossrefs inside the OEIS database.

why not a map with nodes which point directly on keywords such as Fibonacci,
De Bruijn..and give related sequences with direct external "_blank" link.

why not just a fun tool for the general public (public to which I belong)
accessible through a tutorial (that i can elaborate).

Finally why not a picture, card, poster to advertise for OEIS, and raise
funds indirectly.

Concerning gexf.js, I am preparing a online demo with a small batch of data
from the OEIS.

Best Regards
Eric