17 lines
388 B
JavaScript
17 lines
388 B
JavaScript
/**
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* Returns the average of cosine distances between vectors a and b
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* @param a - first vector
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* @param b - second vector
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*
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*/
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export function cosine(a, b) {
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let p = 0;
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let p2 = 0;
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let q2 = 0;
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for (let i = 0; i < a.length; i++) {
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p += a[i] * b[i];
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p2 += a[i] * a[i];
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q2 += b[i] * b[i];
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}
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return p / (Math.sqrt(p2) * Math.sqrt(q2));
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}
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