mirror of
https://github.com/ClusterCockpit/cc-backend
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61 lines
1.2 KiB
Go
61 lines
1.2 KiB
Go
// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.
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// All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package util
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import (
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"golang.org/x/exp/constraints"
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"fmt"
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"math"
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"sort"
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)
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func Min[T constraints.Ordered](a, b T) T {
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if a < b {
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return a
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}
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return b
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}
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func Max[T constraints.Ordered](a, b T) T {
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if a > b {
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return a
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}
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return b
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}
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func sortedCopy(input []float64) []float64 {
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sorted := make([]float64, len(input))
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copy(sorted, input)
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sort.Float64s(sorted)
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return sorted
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}
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func Mean(input []float64) (float64, error) {
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if len(input) == 0 {
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return math.NaN(), fmt.Errorf("input array is empty: %#v", input)
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}
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sum := 0.0
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for _, n := range input {
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sum += n
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}
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return sum / float64(len(input)), nil
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}
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func Median(input []float64) (median float64, err error) {
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c := sortedCopy(input)
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// Even numbers: add the two middle numbers, divide by two (use mean function)
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// Odd numbers: Use the middle number
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l := len(c)
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if l == 0 {
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return math.NaN(), fmt.Errorf("input array is empty: %#v", input)
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} else if l%2 == 0 {
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median, _ = Mean(c[l/2-1 : l/2+1])
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} else {
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median = c[l/2]
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}
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return median, nil
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}
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