Creating a data set from the report's already-filtered data?

My main report already has开发者_运维百科 a complex filter, and rather than try and build it again with subqueries for my new data set, I'd like to simply query from the filtered result set itself. That is, can I specify that a data set use the data of the main report?

I'm using a data set to populate a pie graph, and I was wondering if this was possible.

This is impossible, but if you restructure your data into a better reporting format, you probably don't need to do this.