From 7dd6097d42d6d6f254a84ab0111bac70f0358660 Mon Sep 17 00:00:00 2001
From: zhangqian <zhangqian@123.com>
Date: 星期二, 30 四月 2024 10:20:40 +0800
Subject: [PATCH] 加一些注释
---
utils/mathx.go | 36 +++++++++++++++++++++++++++++++++++-
1 files changed, 35 insertions(+), 1 deletions(-)
diff --git a/utils/mathx.go b/utils/mathx.go
index 3bbf646..f43ead9 100644
--- a/utils/mathx.go
+++ b/utils/mathx.go
@@ -1,7 +1,11 @@
package utils
-import "github.com/shopspring/decimal"
+import (
+ "github.com/shopspring/decimal"
+ "sort"
+)
+// Average 鍙栧钩鍧囧��
func Average(numbers []decimal.Decimal) decimal.Decimal {
if len(numbers) == 0 {
return decimal.Decimal{}
@@ -16,6 +20,7 @@
return sum.Div(decimal.NewFromInt(int64(len(numbers))))
}
+// Deviation 鍋忓樊
func Deviation(numbers []decimal.Decimal) decimal.Decimal {
if len(numbers) == 0 || len(numbers) == 1 {
return decimal.Decimal{}
@@ -28,3 +33,32 @@
}
return diffSquaredSum.Div(decimal.NewFromInt(int64(len(numbers))))
}
+
+// TotalDeviation 鎬诲樊
+func TotalDeviation(numbers []decimal.Decimal, average decimal.Decimal) decimal.Decimal {
+ if len(numbers) < 2 {
+ return decimal.Zero
+ }
+
+ n := len(numbers)
+ ratio := decimal.NewFromFloat(0.02)
+ length := decimal.NewFromInt(int64(n)).Mul(ratio).Ceil().IntPart()
+ if length >= int64(n) {
+ return decimal.Zero
+ }
+
+ sort.Slice(numbers, func(i, j int) bool {
+ return numbers[i].LessThan(numbers[j])
+ })
+
+ minPart := numbers[:length-1]
+ maxPart := numbers[length:]
+
+ minAverage := Average(minPart)
+ maxAverage := Average(maxPart)
+
+ minDiff := minAverage.Sub(average).Abs()
+ maxDiff := maxAverage.Sub(average).Abs()
+
+ return decimal.Max(minDiff, maxDiff)
+}
--
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