[R] Novel (Maybe?) Visualizations
D. Dashcle
I'm interested in using R's plotting capabilities to try to generate a graph showing the relationship/pairing frequency of words appearing in a block of unstructured text. I don't have a specific algorithm or approach in mind, just looking to portray text in an interesting fashion. The output I'm hoping for is something like the following called a "Phrase Network":
http://manyeyes.alphaworks.ibm.com/manyeyes/page/Phrase_Net.html
I found this package which seems semi-related, but I haven't been getting great results and I'm not sure if I'm on the right track.
http://tm.r-forge.r-project.org/screenshots.html
Does anyone have suggestions for another package I should look into?
-D
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Johannes Huesing
>
> I'm interested in using R's plotting capabilities to try to generate
a graph showing the relationship/pairing frequency of words
appearing in a block of unstructured text. I don't have a specific
algorithm or approach in mind, just looking to portray text in an
interesting fashion. The output I'm hoping for is something like the
following called a "Phrase Network":
>
> http://manyeyes.alphaworks.ibm.com/manyeyes/page/Phrase_Net.html
It looks like you need algorithms to position nodes in order to minimise
edge lengths and overlap. A well known program which does that is
graphviz. I am quite sure that no one has taken the effort to re-implement
the algorithm in R, but there are many R packages that interact with graphviz.
I would look for "graphviz" in www.rseek.org and procede from there.
--
Johannes Hüsing There is something fascinating about science.
One gets such wholesale returns of conjecture
mailto:joha...@huesing.name from such a trifling investment of fact.
http://derwisch.wikidot.com (Mark Twain, "Life on the Mississippi")
stvienna wiener
> D. Dashcle <d.da...@hotmail.com> [Wed, Feb 10, 2010 at 01:13:58AM CET]:
> I would look for "graphviz" in www.rseek.org and procede from there.
Is graphviz really the only option? I guss so, but the license of
graphviz is very restricted and not comparable
to the usal open source licenses, e.g. GPL or similar.
I spent about a day to find information on graphs in R, search and
searched, tried many libraries, etc.
Compared to other subjects or areas, I found very little and the
quality was limited.
What I need would be:
- import/export from GraphML
- basic and advanced graph algorithms
- nice visualization of graphs (graphviz)
- interactive input of graphs (or external program and import via GraphML)
Is R the right programming language for that? (I think it is...)
Are there any pointers? Books or tutorials on using R for graph stuff.?
Any help is very much appreciated!
Best regards,
St.
Liviu Andronic
> - interactive input of graphs (or external program and import via GraphML)
>
> Is R the right programming language for that? (I think it is...)
>
> Are there any pointers? Books or tutorials on using R for graph stuff.?
>
This [1][2] might provide some pointers. Also look at the Graphs Task View.
Liviu
[1] http://www.metaresearch.de/exlib/
[2] http://bm2.genes.nig.ac.jp/RGM2/index.php?clear=all