New / Lost customers

[#1]

Hello All,

I've appreciated the discussion about the problem of calculating new and lost customers (http://community.qlik.com/thread/14707) and I've tried to apply suggestions to my scenario, but data dimension doesn't allow me the use of aggr.

I've tried to adapt the example with a different set analysis, and it works, but only selecting a month and only for the selected month.

Is the aggr the only solution?

Thanks in advance

Luca

[#2]

Sorry, the correct file...