Help me with the Best model for extreme class imbalance (6 normal, 1 abnormal)? Isolation Forest giving 1.9% FP, XGB/LGBM just overfit to 99.9% acc
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I don't have enough data but gotta train something anyway lol. Right now I've got an Isolation Forest giving ~1.9% false positive rate. Tried XGBoost/LightGBM too but they just hit 99.9% accuracy by predicting the majority class every time, basically overfit/useless, 0 recall on the actual abnormal…
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- 2026-09-06 04:36 · r/learnmachinelearning
Help me with the Best model for extreme class imbalance (6 normal, 1 abnormal)? Isolation Forest giving 1.9% FP, XGB/LGBM just overfit to 99.9% acc