Hi all, 

I seem to have run into a problem using SMOTE with weka knowlege flow (version 3.7.12).

I have an unbalanced dataset, so I'm channeling my dataset into a filtered classifier. My filtered classifier uses multiple algorithms, but each of them has SMOTE specified as a filter. However, it seems that SMOTE is not generating synthetic data no matter how I set the boosting, and I end up with the same number of rows that I originally fed into the knowledge flow.

I'll be happy to share the full knowledge flow process with anyone who wants to see, but basically, what i'm doing is:

Scheme: FilteredClassifier
Options: -F "weka.filters.supervised.instance.SMOTE -C 0 -K 5 -P 150.0 -S 1" -W weka.classifiers.trees.J48 -- -C 0.25 -M 2
Relation: procedures_outcomes_ca-weka.filters.unsupervised.attribute.ClassAssigner-Clast-weka.filters.supervised.attribute.AttributeSelection-Eweka.attributeSelection.InfoGainAttributeEval-Sweka.attributeSelection.Ranker -T -1.7976931348623157E308 -N 1500

On the other hand, SMOTE works fine if I specify it before the filtered classifier (i.e. apply SMOTE first, and then feed the boosted data into the filtered classifier).

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Best Regards,
Suranga