"Failing to aggregate data"
I'm new to RapidMiner and I'm having trouble getting the aggregate operator to do what I want. I wonder if anyone can help me.
I have a large exampleset (~65000 lines) with about 5 attributes (1 id e 4 nominal). Since I would like to identify the distribution of values in, say, Attr_1, I use aggregate with "Attr_1/count" in Aggregation Attribute, and Attr_1 selected in "group_by_attributes". "Count all combinations", "count only distinct" and "ignore missings" are unchecked.
The result of the count however does not represent the distribution of values in Attr_1 in the original example set.
What am I doing wrong?
I really appreciate any kind of support.