Module: Google::Cloud::Firestore::V1::StructuredQuery::FindNearest::DistanceMeasure

Defined in:

proto_docs/google/firestore/v1/query.rb

Overview

The distance measure to use when comparing vectors.

Constant Summary

DISTANCE_MEASURE_UNSPECIFIED =

Should not be set.

0

EUCLIDEAN =

Measures the EUCLIDEAN distance between the vectors. See Euclidean to learn more. The resulting distance decreases the more similar two vectors are.

1

COSINE =

COSINE distance 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 about COSINE similarity and COSINE distance. The resulting COSINE distance decreases the more similar two vectors are.

2

DOT_PRODUCT =

Similar to cosine but is affected by the magnitude of the vectors. See Dot Product to learn more. The resulting distance increases the more similar two vectors are.

3