
Hi,

I am using code below to get a plot that will show me on the X axis the
number of clusters and on the Y axis the cluster average widths. However I
am getting this error:

Error in summary(silhouette(cutree(d, x), dist(iris[, -5])))$si.summary : 
  $ operator is invalid for atomic vectors

the code I am using is:

avgs<-sapply(1:20,function(x)
summary(silhouette(cutree(d,x),
dist(iris[,-5])))$si.summary[4]) 

I think the problem is on the si.summary.

What can I do to solve this problem?

thank you

Regards,
A Dias.
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