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hover.rankExpression.closest(name).md Maven / Gradle / Ivy

Used with the
[nearestNeighbor](https://docs.vespa.ai/en/reference/query-language-reference.html#nearestneighbor)
query operator and a tensor field attribute name storing multiple vectors per document.
This feature returns a tensor with one mapped dimension and one point with a value of 1.0,
where the label of that point indicates which document vector was closest to the
query vector in the nearest neighbor search.


Given a tensor field with type `tensor(m{},x[3])`
used with the nearestNeighbor operator,
an example output of this feature is:

```
tensor(m{}):{ 3: 1.0 }
```


In this example, the document vector with label 3 in the mapped m dimension
was closest to the query vector.