One-hot encoding very high-cardinality categoricals can cause:

Question

Accepted Answer

Huge sparse dimensionality and memory pressure; consider hashing/target encoding/embeddings carefully — Mega-cardinality one-hot = sparse blowup; consider hashing/target/embeddings.

Answer

Always better linear model performance without cost

Answer

Mandatory use of images

Answer

Automatic early stopping

One-hot encoding very high-cardinality categoricals can cause:

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