RapidMiner 9.7 is Now Available
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It's great that we have the AUPRC value generated through the Operator Toolbox Extension. What would be much more useful is the Precision-Recall curves for a classifier (for any given threshold or cutoff value), especially when the dataset has a significant skew for the class labels. See the linked description about this, borrowed from the "Introduction to Data Mining" (2nd edition) by Tan et al. The intent is show the resultant PR-curve: PR-curve link (part 1), PR-curve link (part 2)