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median of medians

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This commit is contained in:
Bel LaPointe
2023-10-26 06:16:23 -06:00
parent 45beb54fbc
commit c7423f8f72
1 changed files with 15 additions and 3 deletions
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18
ledger/predict.go
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@@ -80,17 +80,29 @@ func registerWithContributionPredictionForNameForCurrency(reg Register, window t
if wouldBe == 0 {
wouldBe = 2
}
return contributions[len(contributions)-wouldBe:]
return contributions[len(contributions)-1-wouldBe:]
}
eighth := contributsSlice(7.0 / 8.0)
quarter := contributsSlice(3.0 / 4.0)
half := contributsSlice(1.0 / 2.0)
medianValueDelta := func() float64 {
return (4.0*getMedianValueDelta(eighth) + 2.0*getMedianValueDelta(quarter) + 1.0*getMedianValueDelta(half)) / (4.0 + 2.0 + 1.0)
medians := []float64{
getMedianValueDelta(eighth),
getMedianValueDelta(quarter),
getMedianValueDelta(half),
}
slices.Sort(medians)
return medians[1]
}()
medianLapse := func() time.Duration {
return (4.0*getMedianLapse(eighth) + 2.0*getMedianLapse(quarter) + 1.0*getMedianLapse(half)) / (4.0 + 2.0 + 1.0)
medians := []time.Duration{
getMedianLapse(eighth),
getMedianLapse(quarter),
getMedianLapse(half),
}
slices.Sort(medians)
return medians[1]
}()
latest := func() float64 {