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go-zero/core/mathx/entropy.go

15 lines
264 B
Go

package mathx
import "math"
func CalcEntropy(m map[interface{}]int, total int) float64 {
var entropy float64
for _, v := range m {
proba := float64(v) / float64(total)
entropy -= proba * math.Log2(proba)
}
return entropy / math.Log2(float64(len(m)))
}