Sounds interesting! I had a look, but couldn't find out what sigma does. This is not quite the same level as, say, the PostgreSQL documentation: http://www.cat

Sounds interesting! I had a look, but couldn't find out what sigma does. This is not quite the same level as, say, the PostgreSQL documentation: http://www.categoricaldata.net/help/instancesigma.html http://www.categoricaldata.net/help/instancesigma.html Is there somewhere i can go for a worked example of using sigma?