I am new to Ecto and so far I have been able to successfully run a number of plasms for filtering, finding clusters and so on. Now suppose I want to iterate through the indices or points output by the plasm. For example, perhaps I want to find the centroid of the largest cluster. It's not clear to me from the documentation how to process a cloud at this "granular" level. Do I have to write my own cell to compute the centroid and add it to the plasm? Or can I execute the plasm one iteration at a time in a loop and somehow pull off the output on each cycle so I can process the cloud using other methods?

Thanks,
patrick