# cosine_similarity

> **Function** in `langchain_postgres`

📖 [View in docs](https://reference.langchain.com/python/langchain-postgres/_utils/cosine_similarity)

Row-wise cosine similarity between two equal-width matrices.

## Signature

```python
cosine_similarity(
    X: Matrix,
    Y: Matrix,
) -> np.ndarray
```

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[View source on GitHub](https://github.com/langchain-ai/langchain-postgres/blob/9d819182da7e3fb1b815e6c9a6b7c2cd1eb4bc0e/langchain_postgres/_utils.py#L16)