How to show top 10 contributors in any dimension field?
I think this might help, I'd need more details to know if that would answer your question.
You could also try a beast mode if you're trying to do something else, again we'd need more and specific details to help.
on your data table in analyzer there is a text box you can enter a number which will restrict the number or records displayed. You can sort by your metric and it will then display the top X number of records