28 lines
598 B
Go
28 lines
598 B
Go
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package onlinestats
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import "sort"
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// Tukey returns the slice (sorted) with all the 1.5 IQR outliers removed
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func Tukey(data []float64) []float64 {
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sort.Float64s(data)
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first := int(0.25 * float64(len(data)))
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third := int(0.75 * float64(len(data)))
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iqr := data[third] - data[first]
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min := data[first] - 1.5*iqr
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max := data[third] + 1.5*iqr
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// TODO(dgryski): our data is sorted; we should be able to trim these elements faster than O(n)
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result := make([]float64, 0, len(data))
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for _, r := range data {
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if r >= min && r <= max {
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result = append(result, r)
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}
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}
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return result
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}
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