Huber loss: a loss that does not panic at an outlier

Drag the error along: Huber is half its square inside delta and only grows linearly outside, so one wild miss pulls on the model with a bounded force. The dashed curve is the pure square.

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Where the numbers come from

gHashTag/t27 specs/ml/loss/huber_loss.t27 (t27 master 239b4b059): every value on the page is its fn bodies, compiled to wasm (logic.js)
Course 10 of t27.ai, neural-networks (gHashTag/trinity#1695): lesson 15 opens this widget

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