Calculating kmedoids' clusters size

How can I calculate the size of each cluster produced by kmedoids?

Answer 1

[Mann Baidi]

Hi Aviram,

Assuming that you would like to get the size of each cluster generated by 'kmedoids' cluster. You can use the 'histcounts' function to count the number of occurrences of each cluster index 'IDX'. Here's is an example for the same:

% Generate random data for clustering
rng(1); % Set seed for reproducibility
data = randn(100, 2);

% Set the number of clusters (K)
K = 3;

% Perform K-Medoids clustering
[IDX, C] = kmedoids(data, K);

% Count the number of elements in each cluster
clusterSizes = histcounts(IDX, 1:(K+1));

% Display the cluster sizes
disp('Cluster Sizes:');

Cluster Sizes:

disp(clusterSizes);

    26    39    35

For more information on "histcounts" function, you can refer to the link below:

https://www.mathworks.com/help/matlab/ref/histcounts.html

Hope this will help in resolving the query!