machine-learningruntime-errorclassificationweka
WEKA's "Class has to be nominal if cost matrix given" error
I am trying to classify a data with 51 features with the command
DecisionTable -X 1 -S "weka.attributeSelection.GreedyStepwise -T -1.79 -N -1 -num-slots 1"
but I am getting the error
What does this error mean about nominal class for cost matrix?
Solution
As mentioned by knb, you can solve this problem by changing the non-nominal values to Nominal. You can use Multifilter to have many filters.
You can find the Remove filter in the Multifilter under
Filters > Unsupervised > Attribute > Remove.You can find the NumericToNomial
Filters > Unsupervised > Attribute > NumericToNomial
Example showing Multifilter with Remove Filter and NumericToNomial
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