Could anyone suggest me how to form the clusters based on the throughput value with respect to particle swarm formulation

I need to do user clustering based on particle swarm optimization.

I developed the coding in which I have considered the swarm best,personal best,global best,swarm fitness,global fitness all in terms of throughput value.

In order to begin the coding I have clustered users in a random manner to compute the throughput.

For example i am having three users in my system and based on random clustering it generates two clusters {1},{2,3}.Based on these two clusters i have computed the throughput and I am assigning that throughput to be the personal best inorder to start with the PSO algorithm.

On first iteration the personal best gets updated and gives the value in terms of throughput.

Now i need to form the clusters based on the throughput value.

Could anyone suggest me how to form the clusters based on the throughput value.