# What are the ways to combine the scores of keyword search + vector search other than the RRF ranking recently used?

**URL:** <https://discuss.elastic.co/t/what-are-the-ways-to-combine-the-scores-of-keyword-search-vector-search-other-than-the-rrf-ranking-recently-used/336914>\
**Category:** Elasticsearch\
**Tags:** vector-search\
**Created:** [June 26, 2023, 2:14pm UTC](https://discuss.elastic.co/t/what-are-the-ways-to-combine-the-scores-of-keyword-search-vector-search-other-than-the-rrf-ranking-recently-used/336914 "2023-06-26T14:14:57Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Rahul\_Agarwal1](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rahul_agarwal1/32/117993_2.png) [@Rahul\_Agarwal1](https://discuss.elastic.co/u/Rahul_Agarwal1)\
**Post date:** [June 26, 2023, 2:14pm UTC](https://discuss.elastic.co/t/what-are-the-ways-to-combine-the-scores-of-keyword-search-vector-search-other-than-the-rrf-ranking-recently-used/336914/1 "2023-06-26T14:14:57Z")

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I want to combine the scores of knn search + normal keyword search. What are the ways of doing it other than the RRF ranking recently added?

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**Author:** ![BenTrent](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bentrent/32/33915_2.png) [@BenTrent](https://discuss.elastic.co/u/BenTrent)\
**Post date:** [June 27, 2023, 1:27pm UTC](https://discuss.elastic.co/t/what-are-the-ways-to-combine-the-scores-of-keyword-search-vector-search-other-than-the-rrf-ranking-recently-used/336914/2 "2023-06-27T13:27:31Z")

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@Rahul_Agarwal1

Yes, you can do a weighted linear combination. When you do a normal `_search` call without providing `rank` that is what is done. We do a linear combination of the scores where each score respects their provided `boost`.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 25, 2023, 1:28pm UTC](https://discuss.elastic.co/t/what-are-the-ways-to-combine-the-scores-of-keyword-search-vector-search-other-than-the-rrf-ranking-recently-used/336914/3 "2023-07-25T13:28:08Z")

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