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main.go
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main.go
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package main
import (
"fmt"
"math"
"os"
"strconv"
"github.com/sile/kurobako-go"
)
type rastriginProblemFactory struct {
dim int
}
func (r *rastriginProblemFactory) Specification() (*kurobako.ProblemSpec, error) {
spec := kurobako.NewProblemSpec(fmt.Sprintf("Rastrigin function (dim=%d)", r.dim))
spec.Params = make([]kurobako.Var, r.dim)
for i := 0; i < r.dim; i++ {
x := kurobako.NewVar("x" + strconv.Itoa(i+1))
x.Range = kurobako.ContinuousRange{Low: -5.12, High: 5.12}.ToRange()
spec.Params[i] = x
}
spec.Values = []kurobako.Var{kurobako.NewVar("Rastrigin")}
return &spec, nil
}
func (r *rastriginProblemFactory) CreateProblem(seed int64) (kurobako.Problem, error) {
return &rastriginProblem{}, nil
}
type rastriginProblem struct {
}
func (r *rastriginProblem) CreateEvaluator(params []float64) (kurobako.Evaluator, error) {
return &rastriginEvaluator{params: params}, nil
}
type rastriginEvaluator struct {
params []float64
}
func (r *rastriginEvaluator) Evaluate(nextStep uint64) (uint64, []float64, error) {
v := float64(10 * len(r.params))
for i := range r.params {
v += math.Pow(r.params[i], 2) - 10*math.Cos(2*math.Pi*r.params[i])
}
return 1, []float64{v}, nil
}
func main() {
var dim int
if len(os.Args) == 2 {
a := os.Args[1]
b, err := strconv.Atoi(a)
if err != nil {
panic(err)
}
dim = b
}
runner := kurobako.NewProblemRunner(&rastriginProblemFactory{
dim: dim,
})
if err := runner.Run(); err != nil {
panic(err)
}
}