Hi I'm quite confused about Partitioning Around Medoids.
Firstly, When the centre objects are swapped, how many objects are supposed to be swapped? For example, if there are 4 medoids, then do all of them need to be changed? or just one? or does it depend on analyst?
Secondly, there were 4 medoids A,B,C,D and D is swapped with E. However, what if A,B,D,E were best objects in forming clusters? I know once object is replaced, the object never come back. Or should I take this thing as a drawback of PAM?
Thank you so much!!!!! Have a amazing day :)