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**🗄️ ARCHIVED DOCUMENT**

This document is archived for historical reference and is no longer actively maintained. 
For current documentation, see [docs/README_DOCS_STRUCTURE.md](README_DOCS_STRUCTURE.md).

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# API reference: features & chemometrics (legacy)

> **Status: Legacy / Archived**  
> Superseded by [API index](../api/index.md) and module pages (api/features.md, api/chemometrics.md). Kept for reference only.

Feature extractors and chemometrics models power FoodSpec workflows. For examples, see the Oil authentication and Mixture tutorials.

## Features
::: foodspec.features.peaks
::: foodspec.features.bands
::: foodspec.features.ratios
::: foodspec.features.fingerprint

## Chemometrics
::: foodspec.chemometrics.pca
::: foodspec.chemometrics.models
::: foodspec.chemometrics.validation
::: foodspec.chemometrics.mixture
::: foodspec.chemometrics.deep
> **Status:** Archived  
> This page has been superseded by the unified API reference. See [API index](../api/index.md) for current feature and chemometrics APIs.
