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