On Tue, 28 Jun 2005, Karen Kotschy wrote:> Hi again > > Sorry, in looking again at sammon and isoMDS I see that they seem to do > exactly what I want, except that they are non-metric, which means, as I > understand it, that they relate the rank orders of the variables rather than > the actual distances. > > Could I use these non-metric MDS packages even if my distances are metric?Yes. BTW, Sammon is not ordinal. What `non-metric' means depends on who is using the term. -- Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595
Hi again Sorry, in looking again at sammon and isoMDS I see that they seem to do exactly what I want, except that they are non-metric, which means, as I understand it, that they relate the rank orders of the variables rather than the actual distances. Could I use these non-metric MDS packages even if my distances are metric? Thanks Karen -- Karen Kotschy Centre for Water in the Environment University of the Witwatersrand Johannesburg P/Bag X3, Wits, 2050 Tel: +2711 717-6425
Try also ?sphpca (library(psy) --> new version 0.7) Best Bruno ---------------------------------------------------------------------------- Bruno Falissard INSERM U669, PSIGIAM "Paris Sud Innovation Group in Adolescent Mental Health" Maison de Solenn 97 Boulevard de Port Royal 75679 Paris cedex 14, France tel : (+33) 6 81 82 70 76 fax : (+33) 1 45 59 34 18 web site : http://perso.wanadoo.fr/bruno.falissard/ ---------------------------------------------------------------------------- -----Message d'origine----- De??: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] De la part de Karen Kotschy Envoy????: mardi 28 juin 2005 13:39 ????: r-help at stat.math.ethz.ch Objet??: [R] enhanced MDS Hi again Sorry, in looking again at sammon and isoMDS I see that they seem to do exactly what I want, except that they are non-metric, which means, as I understand it, that they relate the rank orders of the variables rather than the actual distances. Could I use these non-metric MDS packages even if my distances are metric? Thanks Karen -- Karen Kotschy Centre for Water in the Environment University of the Witwatersrand Johannesburg P/Bag X3, Wits, 2050 Tel: +2711 717-6425 ______________________________________________ R-help at stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html