After model validation, ROC was not show on the performance, but ROC (threshold)

BorriwatBorriwat Member Posts: 1 Newbie
edited February 2020 in Help
I'm working with only 59 data (7 positve class, 52 negative class). First, I use sample operator to balanced data (undersampling) and create decision tree model with cross-validation. After I check the performance of the model, the ROC showed as the picture. It has only blue line, which is ROC (Threshold).

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