select attributes with at least one entry
Hi...having a brain freeze with what should be a very simple thing. I have a data set with 250+ nominal and numerical attributes, many of which are completely empty (all missing values). Others have perhaps one or two entries with the rest missing. How do I eliminate all attributes, nominal and numerical, that only have ALL missing values? I have tried every combination of operators (including Ingo's workaround posted a while ago) to no avail.