42 lines
816 B
Go
42 lines
816 B
Go
// Copyright 2022 wanderer <a_mirre at utb dot cz>
|
|
// SPDX-License-Identifier: GPL-3.0-or-later
|
|
|
|
package bench
|
|
|
|
import "math"
|
|
|
|
var Functions = []string{"Schwefel", "De Jong 1st", "De Jong 2nd"}
|
|
|
|
// Schwefel computes a value of the Schwefel function for x.
|
|
func Schwefel(x []float64) float64 {
|
|
var res float64
|
|
|
|
for _, val := range x {
|
|
res += val * math.Sin(math.Sqrt(math.Abs(val)))
|
|
}
|
|
|
|
return 418.9829*float64(len(x)) - res
|
|
}
|
|
|
|
// DeJong1st computes the value of the 1st De Jong function for x.
|
|
func DeJong1st(x []float64) float64 {
|
|
var res float64
|
|
|
|
for _, val := range x {
|
|
res += math.Pow(val, 2)
|
|
}
|
|
|
|
return res
|
|
}
|
|
|
|
// DeJong2nd computes the value of the 2nd De Jong function for x.
|
|
func DeJong2nd(x []float64) float64 {
|
|
var res float64
|
|
|
|
for _, val := range x {
|
|
res += math.Floor(val)
|
|
}
|
|
|
|
return res
|
|
}
|