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Jan 21, 2026 · Artificial Intelligence
Understanding Vector Similarity in Machine Learning: A Plain‑Language Guide
The article explains key vector similarity measures—dot product, cosine similarity, and L1/L2 distances—illustrates their geometric meanings, compares their behavior with concrete examples and PyTorch/Numpy code, and discusses when to prefer each metric in machine‑learning tasks.
L1 distanceL2 distancePyTorch
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