> ## Documentation Index
> Fetch the complete documentation index at: https://shapely.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Feature Joiner

>  Feature Joiner combines multiple separate feature lists into a single unified feature matrix. It merges individual feature columns into one structured dataset.

This is necessary when your features come from different sources or calculations and need to be combined before training. 

<Note>
  All feature lists being joined **must have the same length** . Ensure each list corresponds to the same set of geometries in the same order.
</Note>

<a href="/images/ML/Feature Joiner.png" target="_blank">
  <img src="https://mintcdn.com/shapely/asBiXHBRV0o--5dI/images/ML/Feature%20Joiner.png?fit=max&auto=format&n=asBiXHBRV0o--5dI&q=85&s=8bca9ccd50ab68addeb6752c2373262d" className="pointer-events-none" style={{ borderRadius: '0.5rem', border: '1px solid rgba(0,0,0,0.1)' }} width="1733" height="1001" data-path="images/ML/Feature Joiner.png" />
</a>