On 14/01/12 2:16 AM, Moris Sverdlin wrote:
I am part of a two man team working in a data mining class working on a
project where we use Weka for several different things including
classifying a dataset. Right now we have finished preprocessing our data
in Excel and want to start using Weka. However there is a problem with
the "MergeTwoValues" filter in the proprocessing panel. In Excel we made
an attribute "CLASS" under which are three different subattributes: N,H
& U. For using the proper cost matrix in Weka it is necesary to merge N
& U into "notH". We tried using the MergeTwoValues filter for that but
keep getting error messages.
Either there is a " Problem filtering instances: For input string
"CLASS" error" or "Problem filtering instances: Cannot process class
What would be the proper syntax to make the configuration of the filter?
In the Preprocess panel there is a drop-down box just above the
histogram visualization in the lower right-hand corner of the window.
Select "No class" from this drop down and you will be able to apply the