Hi there,

 

I use cluster.stats to test which cluster is better, for example:

 

library(fpc) 

data(xclara) 

a3 <- clara(xclara, 3) 

a4 <- clara(xclara, 4) 

d <- dist(xclara) 

val1 <- cluster.stats(d, a3$clust) 

val2 <- cluster.stats(d, a4$clust) 

barplot(c(val1$avg, val2$avg))

 

Which value in the output of cluster.stats can tell us 3 cluster is
better than 4?

 

I also try to test "kmeans" method with "clara" method by using
cluster.stats. The same problem shows up.

 

 

Thank you!


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