clustering after search

[Borbála Siklósi]

Maybe I have quite a simple question, but I haven't been able to find out
the solution. I have a solr index of doucuments and I run kmeans clustering
on them. It all works fine. How can I do that I make a keyword search on the
solr index and run the clustering only on the result set? Can I someway
determine what documents the algorithm should cluster?