Dataset
Also known as: datasets · data
A dataset is a structured collection of examples. In machine learning it’s the raw material the model learns from (or is tested on).
- Training set — what the model learns from.
- Validation set — for tuning while training.
- Test set — the held-out report card.
The quality and breadth of the data often matters more than the architecture.
Golden rule: "garbage in, garbage out". A smarter model on bad data usually loses to a simpler model on great data.