photoprism/pkg/vector/product.go
Michael Mayer 03129c9129 Vector: Reorganize package into topic-based files #4669
Split the catch-all values.go into one file per concept, each mirrored
by its test: distance.go, norm.go, stats.go, product.go, centroid.go,
plus the mean methods folded into mean.go and Copy/Dim/Sum into
vector.go. Remove values.go, values_test.go, and values_more_test.go so
functionality and tests live where developers expect them.

Hoist the two 512-dimensional face embeddings shared by the distance,
norm, and cosine tests into fixtures_test.go, removing the previous
triplication, and decompose the monolithic TestVector into per-concept
tests. Close pre-existing coverage gaps in the integer converters and
the GeometricMean/HarmonicMean method wrappers, bringing the package to
100% statement coverage. Pure code movement; no behavior change.
2026-05-30 09:44:03 +00:00

29 lines
543 B
Go

package vector
import "fmt"
// Product returns a vector of element-wise products of two input vectors.
func Product(a, b Vector) (Vector, error) {
if len(a) != len(b) {
return nil, fmt.Errorf("vector dimensions do not match (%d, %d)", len(a), len(b))
}
p := make(Vector, len(a))
for i := range a {
p[i] = a[i] * b[i]
}
return p, nil
}
// DotProduct returns the dot product of two vectors.
func DotProduct(a, b Vector) (float64, error) {
p, err := Product(a, b)
if err != nil {
return NaN(), err
}
return p.Sum(), nil
}