***** To join INSNA, visit http://www.sfu.ca/~insna/ ***** On Mon, Sep 16, 2002 at 03:17:51AM +0200, Carl Nordlund wrote: > Contrary to spring-embedding, MDS have standardized measurements for the > final stress values (for instance the Kruskal stress formula), which makes > it far more universal and comparative than spring-embedders. So my main > question is: why use spring-embedders at all? Why not use MDS for > visualization purposes and discard spring-embedding techniques altogether? > Any pro-spring-embedding advantages? When using path-distances as dissimilarities and local scaling, the objective function of MDS is exactly that of the Kamada-Kawai spring-embedder variant. For more on spring embedders and their relation with MDS see Drawing on Physical Analogies Chapter 4 in M. Kaufmann, D. Wagner (eds.) Drawing Graphs: Methods and Models Springer LNCS Tutorial 2025:71--86, 2001 which you can download from http://www.inf.uni-konstanz.de/~brandes/publications/b-dpa-01.ps.gz Regards, B. _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.sfu.ca/~insna/). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.