[R] Mclust - which cluster is each observation in?

[Julian Burgos]

Well, you are dealing with probability based clustering, so for each 
bird you will get a probability of belonging to each cluster.  If your 
clusters are well defined, then each bird should have a very high 
probability of belonging to one of the clusters.  You can get this 
probability matrix from your mclust object.

For the iris dataset example,

my.clusters=Mclust(iris[,-5])

This will give you the probability matrix

my.clusters$z

You can assign membership based on these probabilities (i.e. each bird 
belongs to the cluster with highest probability).  You can obtain this 
membership by doing

my.clusters$membership

Hope this helps,

Julian

cnagy wrote:
> I'm trying to test a method of identifying individuals (birds) based on
> measured data (their calls).  
> 
> I have test data from known individual birds, and I am using the Mclust
> package to see if the program can correctly identify which calls come from
> different birds.
> 
> So far, mclust has correctly ID'd the number of birds in the test data set
> (i.e., the correct # of clusters).  However I also need to correctly assign
> each call to the right bird (i.e., data rows (calls) 1 - 10 are in cluster
> (bird) 1; rows 2 - 20 are in cluster 2, etc.).
> 
> Is there a way to get mclust to show the cluster assignments of each
> observation?  
> 
> Thank you
> 
> 
> 
>