Reference documentation and code samples for the Cloud Firestore V1 API module Google::Cloud::Firestore::V1::StructuredQuery::FindNearest::DistanceMeasure.
The distance measure to use when comparing vectors.
Constants
DISTANCE_MEASURE_UNSPECIFIED
value: 0 Should not be set.
EUCLIDEAN
value: 1 Measures the EUCLIDEAN distance between the vectors. See
Euclidean to learn
more
COSINE
value: 2 Compares vectors based on the angle between them, which allows you to
measure similarity that isn't based on the vectors magnitude.
We recommend using DOT_PRODUCT with unit normalized vectors instead of
COSINE distance, which is mathematically equivalent with better
performance. See Cosine
Similarity to learn
more.
DOT_PRODUCT
value: 3 Similar to cosine but is affected by the magnitude of the vectors. See
Dot Product to learn more.
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