# Example (machine learning)

> The values of one row of features and possibly a label.[^1]

The values of one row of [features](https://wiki.g15e.com/pages/Feature%20(machine%20learning.txt)) and possibly a [label](https://wiki.g15e.com/pages/Label%20(machine%20learning.txt)).[^1]

Examples in [supervised learning](https://wiki.g15e.com/pages/Supervised%20learning.txt) fall into two general categories:

- A [labeled example](https://wiki.g15e.com/pages/Labeled%20example.txt) consists of one or more features and a label. Labeled examples are used during training.
- An [unlabeled example](https://wiki.g15e.com/pages/Unlabeled%20example.txt) consists of one or more features but no label. Unlabeled examples are used during inference.

The row of a [dataset](https://wiki.g15e.com/pages/Dataset%20(machine%20learning.txt)) is typically the raw source for an example. That is, an example typically consists of a subset of the columns in the dataset. Furthermore, the features in an example can also include [synthetic features](https://wiki.g15e.com/pages/Synthetic%20feature.txt), such as feature crosses.

## Footnotes

[^1]: https://developers.google.com/machine-learning/glossary#example