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03129c9129
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.
40 lines
691 B
Go
40 lines
691 B
Go
package vector
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// Centroid returns the element-wise mean (centroid) of the given vectors as a
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// new, independent vector. Vectors whose length differs from the first vector
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// are ignored, and the mean is taken over the vectors actually included. It
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// returns nil when vs is empty or the first vector has no elements.
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func Centroid(vs Vectors) Vector {
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if len(vs) == 0 {
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return nil
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}
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dim := len(vs[0])
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if dim == 0 {
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return nil
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}
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result := make(Vector, dim)
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n := 0
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for _, v := range vs {
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if len(v) != dim {
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continue
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}
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for j := range dim {
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result[j] += v[j]
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}
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n++
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}
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inv := 1 / float64(n)
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for j := range result {
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result[j] *= inv
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}
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return result
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}
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