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2001 Nov 01
1
Erratic behaviour of sammon()
...#39;vec2', I get different results. (SAMMON() is a wrapper function). This I did on a Linux machine (R version 1.3.1): > dst <- ReadDistFile("PA.lnk") Loading required package: mva > vec1 <- MDS(dst, 3) > WriteVectorFile(vec1, "outfile") > vec2 <- ReadVectorFile("outfile") > cor(vec1[,1], vec2[,1]) [1] 1 > cor(vec1[,2], vec2[,2]) [1] 1 > cor(vec1[,3], vec2[,3]) [1] 1 > v1 <- SAMMON(dst, 3, y=vec1) Loading required package: MASS Initial stress : 0.20243 stress after 10 iters: 0.11869, magic = 0.018 stress after...