Why can't I select class column in Roc curve configuration?

I have used a decision tree node for classification and I want to display the Roc curve, but after connecting the ROC curve node to the decision tree predictior, the column with the class value does not appear in the possible column to include in roc curve node configuration. How can I solve this?

Hi @Piera -

Have you checked the box in the predictor to “Append columns with normalized class distribution”? That’s my first guess.

If you’re still having problems after checking on that, can you upload an example workflow demonstrating the problem?

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Another guess. The roc curve works only for a binary classification problem.
Gr. Hans

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