AI · VISION · EVERYDAY SYSTEMS

Applied Machine Learning

Class weights change the learning penalty, not the population you measure

Class weights alter a classifier’s training penalties. Use a small numerical example to see why they do not change the real-world frequency of a class.

29 October 2026 · 2 min read

Applied Machine Learning

An unseen category needs a plan before one-hot encoding goes live

Decide how a one-hot encoder should handle unseen categories, and test the distinction between an unknown value, missing data and a dropped reference category.

27 October 2026 · 2 min read

Applied Machine Learning

Changing a Classification Threshold Changes Which AI Mistakes You See

See how a classifier’s decision threshold changes false alarms and missed cases, using a small worked example and a fixed evaluation set.

22 October 2026 · 2 min read