Plot the change in AUC metric at a drift incrementally at every feature vector addition when signalling a drift
When drift is signaled, AUC goes above a certain threshold. At this point, there are two windows, the old and new concepts. We plot the AUC of the linear regressor without any new concept and then incrementally when each feature vector from the new concept is added. A decrease in AUC would mean a feature vector from the old concept was added and vice versa.