"Aggregate Operator creates empty example set with Group-By date"
I have a problem with the group-by operator. I have an exampleset, where I want to aggregate some per-day information. So I created an attribute which contains the date of every example, added the Aggregate operator and used the date as group-by attribute. This always gives me an empty exampleset as result. In some tests I found that I always get an empty result if there is a group-by attribute of type date.
At the moment I convert these dates to nominal before and back after aggregation as workaround.
I also posted this in the bugtracker some time ago, but because it didn't get fixed nor anyone commented, I wanted to confirm that this is not just a problem of my configuration? At least I guess it's not the desired behaviour?