65 lines
1.8 KiB
Go
65 lines
1.8 KiB
Go
package producer
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import (
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"fmt"
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log "github.com/sirupsen/logrus"
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"gonum.org/v1/gonum/mat"
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"gonum.org/v1/gonum/optimize"
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)
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type NormElements struct {
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LineOff, SampOff, LatOff, LonOff, HeightOff float64
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LineScale, SampScale, LatScale, LonScale, HeightScale float64
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}
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func objectiveFunc(numerator, denominator, f, latVec, lonVec, heightVec *mat.VecDense) float64 {
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errorSquared := 0.0
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n := f.Len()
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for i := 0; i < n; i++ {
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predictedV := project(numerator, denominator, latVec.AtVec(i), lonVec.AtVec(i), heightVec.AtVec(i))
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errorV := predictedV - f.AtVec(i)
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errorSquared += errorV * errorV
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}
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return errorSquared / float64(n)
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}
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func solveNelderMead(num, den, f, latVec, lonVec, heightVec *mat.VecDense) (*mat.VecDense, *mat.VecDense, error) {
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var initCoeffs []float64 // a0-a19,b1-b19
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initCoeffs = append(initCoeffs, num.RawVector().Data...)
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for i := 1; i < 20; i++ {
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initCoeffs = append(initCoeffs, den.AtVec(i))
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}
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problem := optimize.Problem{
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Func: func(coeffs []float64) float64 {
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numerator := mat.NewVecDense(20, nil)
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denominator := mat.NewVecDense(20, nil)
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denominator.SetVec(0, 1.0)
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numerator.SetVec(0, coeffs[0])
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for i := 1; i < 20; i++ {
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numerator.SetVec(i, coeffs[i])
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denominator.SetVec(i, coeffs[i+19])
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}
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return objectiveFunc(numerator, denominator, f, latVec, lonVec, heightVec)
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},
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}
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result, err := optimize.Minimize(problem, initCoeffs, &optimize.Settings{}, &optimize.NelderMead{})
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if err != nil {
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log.Error("Error in RPC optimization: ", err)
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return nil, nil, err
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}
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numerator := mat.NewVecDense(20, nil)
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denominator := mat.NewVecDense(20, nil)
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denominator.SetVec(0, 1.0)
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numerator.SetVec(0, result.X[0])
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fmt.Println("len of result.X: ", len(result.X))
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for i := 1; i < 20; i++ {
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numerator.SetVec(i, result.X[i])
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denominator.SetVec(i, result.X[i+19])
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}
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return numerator, denominator, nil
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}
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