classification
Everything on Ground Truth tagged “classification” — 2 items.
ROC curves and AUC: the number behind 'the detector works' Lesson
AUC measures how well a detector ranks positives above negatives across every possible threshold, which is why 0.5 means coin flip and why a high AUC can still hide a useless system.
Softmax and Cross-Entropy: How a Model Turns Scores Into a Confident Guess Lesson
Softmax turns a model's raw scores into a probability distribution, and cross-entropy measures how far that distribution is from the true answer; together they are the training target behind almost every classifier and language model.