Just some quick questions to clarify my doubt please.
I know that one can get precision/recall
for each class in a multiclass problem, e.g. in this classification report:
Classification report
precision recall f1-score support
0 0.65 0.62 0.63 14601
1 0.07 0.27 0.11 1398
2 0.43 0.06 0.10 8317
3 0.58 0.70 0.64 20301
4 0.00 0.00 0.00 904
accuracy 0.53 45521
macro avg 0.34 0.33 0.30 45521
weighted avg 0.55 0.53 0.51 45521
Accuracy is not computed as per class, since it's a global metric.
- Can one also computes
ROC AUC
for each class. - What the difference between
macro/weighted avg precision/recall
and the value for each class. Is that representing a global measure ofprecision/recall
?