Dear Listmembers, in my final paper I�m dealing with both metric MDS (Torgersons�s Triadic combinations from his book 1958) and nonmetric MDS (Kruskal�s algorithm) as "milestones of MDS". The most important advantage of nonmetric MDS are the low requirements to data, i.e. the algorithm requires only ordinal data to reconstruct a configuration of objects. Nevertheless the procedure yields metric information within the configuration. My problem is how to give a reasonable justification for that fact. I suppose it`s because of the constraints simultaneously concerning all objects. What is the minimum number of objects to have no noticeable difference between an ordinal and an metric configuration? Could anyone perhaps give me an statement on this subject or at least a reference for a quotation?
Many thanks an best regards, Simon Gollick __________________________________________________________________ Gesendet von Yahoo! Mail - http://mail.yahoo.de Logos und Klingelt�ne f�rs Handy bei http://sms.yahoo.de
