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May 7, 2024
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update docs #1444

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25 changes: 2 additions & 23 deletions pgml-cms/docs/api/sql-extension/pgml.decompose.md
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Expand Up @@ -4,8 +4,7 @@ description: Decompose an input vector into it's principal components

# pgml.decompose()


Chunks are pieces of documents split using some specified splitter. This is typically done before embedding.
Matrix decomposition reduces the number of dimensions in a vector, to improve relevance and reduce computation required.

## API

Expand All @@ -21,30 +20,10 @@ pgml.decompose(
| Parameter | Example | Description |
|----------------|---------------------------------|----------------------------------------------------------|
| `project_name` | `'My First PostgresML Project'` | The project name used to train models in `pgml.train()`. |
| `vector` | `ARRAY[0.1, 0.45, 1.0]` | The feature vector that needs decomposition. |
| `vector` | `ARRAY[0.1, 0.45, 1.0]` | The feature vector to transform. |

## Example

```sql
SELECT pgml.decompose('My PCA', ARRAY[0.1, 2.0, 5.0]);
```

!!! example

```sql
SELECT *,
pgml.decompose(
'Buy it Again',
ARRAY[
user.location_id,
NOW() - user.created_at,
user.total_purchases_in_dollars
]
) AS buying_score
FROM users
WHERE tenant_id = 5
ORDER BY buying_score
LIMIT 25;
```

!!!
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