Difference between revisions of "Cosine similarity"
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The '''cosine similarity''' measures the similarity between two vectors by the cosine of the angle between them. | The '''cosine similarity''' measures the similarity between two vectors by the cosine of the angle between them. | ||
| − | In [[recommender systems]], the cosine similarity is often used in [[kNN]]-based methods to determine the neighborhood of a [[user]] or [[item]], | + | In [[Recommender System|recommender systems]], the cosine similarity is often used in [[kNN]]-based methods to determine the neighborhood of a [[user]] or [[item]], |
and as a weight to compute predictions using those neighbors. | and as a weight to compute predictions using those neighbors. | ||
== External links == | == External links == | ||
* [[Wikipedia: Cosine similarity]] | * [[Wikipedia: Cosine similarity]] | ||
Revision as of 08:58, 22 February 2011
The cosine similarity measures the similarity between two vectors by the cosine of the angle between them. In recommender systems, the cosine similarity is often used in kNN-based methods to determine the neighborhood of a user or item, and as a weight to compute predictions using those neighbors.
