What is the best way to model the multi-label classification task with no label examples:
For example, we have the following classes: [A, B, C] and our instances are assigned to one or more than one of them. However, we have also some examples without any of these labels, determined as non-findings.
Let’s say the label vectors for annotators 1, 2, and 3 look like this:
A: [1, 0, 0]
B: [0,1, 0]
C: [0, 0, 1]
AB: [1, 1, 0]
AC: [1, 0, 1]
…
Non-finding: [0, 0, 0, 0]
How should I formulize the BCEWithLogitsLoss?