FA-99989 / Evaluation metric aggregation / Member archive
Grouped confusion counts average group matrices · case 04
Grouped confusion counts average group matrices.
Case contract
Rows are [group,actual,predicted]; return pooled [TP,FP,FN,TN] event counts.
Why this case matters
A small explicit evaluation contract makes aggregation behavior reproducible across labeled examples.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| two groups | [0, 0, 0, 0] | [1, 1, 1, 1] | Failed |
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