func (t *sequentialMinimalOptimizationTask) UpdateSeparatingHyperplane() {
for i, p := range t.points {
a := t.alpha[i] * t.target[i]
if a != 0 {
for k := 0; k < t.dimentions; k++ {
t.w[k] += a * p[k]
}
}
}
thresholds := make([]float, t.size)
for i, p := range t.points {
thresholds[i] = scalarProduct(t.w, p) - t.target[i]
}
sort.SortFloats(thresholds)
t.w0 = thresholds[len(thresholds)/2]
}
func makeClassificateVector(points [][]float, target []float, alpha []float) ([]float, float) {
w := make([]float, len(points[0]))
for i := 0; i < len(points); i++ {
if alpha[i] > 0 {
for k := 0; k < len(w); k++ {
w[k] += target[i] * alpha[i] * points[i][k]
}
}
}
// todo: median
thresholds := make([]float, len(alpha))
for i, p := range points {
thresholds[i] = prod(w, p) - target[i]
}
sort.SortFloats(thresholds)
w0 := thresholds[len(thresholds)/2]
return w, w0
}
