mirror of https://github.com/divan/expvarmon.git
42 lines
975 B
Go
42 lines
975 B
Go
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"github.com/antonholmquist/jason"
|
||
|
|
)
|
||
|
|
|
||
|
|
func averageJason(array []*jason.Value) float64 {
|
||
|
|
var arr []float64
|
||
|
|
for _, v := range array {
|
||
|
|
val, _ := v.Float64()
|
||
|
|
arr = append(arr, val)
|
||
|
|
}
|
||
|
|
return average(arr)
|
||
|
|
}
|
||
|
|
|
||
|
|
// average calculates average (mean) value for int/float array
|
||
|
|
// trimming zero values from the right.
|
||
|
|
//
|
||
|
|
// The whole array/average thing was added to support memstats.PauseNs
|
||
|
|
// array, which may be filled with zeroes on very beginning.
|
||
|
|
// Probably it would be better to use Weighted Moving Average and
|
||
|
|
// add some advanced arrays avarages support, but it's probably wouldn't
|
||
|
|
// be used much, but PauseNs will be for sure.
|
||
|
|
func average(arr []float64) float64 {
|
||
|
|
// find rightmost non-zero and trim
|
||
|
|
right := len(arr)
|
||
|
|
for i := right; i > 0; i-- {
|
||
|
|
if arr[i-1] != 0.0 {
|
||
|
|
right = i
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
trimmed := arr[:right]
|
||
|
|
|
||
|
|
// calculate mean
|
||
|
|
var sum float64
|
||
|
|
for _, v := range trimmed {
|
||
|
|
sum += v
|
||
|
|
}
|
||
|
|
return sum / float64(len(trimmed))
|
||
|
|
}
|