[R] one/multi-dimensional scaling with incomplete dissimilarity matrix

David Firth david.firth at nuffield.oxford.ac.uk
Wed Jun 25 13:25:28 CEST 2003


The scaling functions I know about,

isoMDS(MASS)            Kruskal's Non-metric Multidimensional Scaling
cmdscale(mva)           Classical (Metric) Multidimensional Scaling
sammon(MASS)            Sammon's Non-Linear Mapping

all seem to require a complete dissimilarity matrix (ie, no 
dissimilarities missing).  Is there anything available for situations 
where not all dissimilarities are known, ie the dissimilarity matrix 
has (symmetrically) NAs in it?

David




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