[R] How a clustering algorithm in R can end up with negative silhouette values?

[ABABAEI, Behnam]

Hi,


We know that clustering methods in R assign observations to the closest medoids. Hence, it is supposed to be the closest cluster each observation can have. So, I wonder how it is possible to have negative values of silhouette , while we are supposedly assign each observation to the closest cluster and the formula in silhouette method cannot get negative?


Behnam.

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