예제 #1
0
// Sum returns the (possibly weighted) sum of the Sample.
func (s Sample) Sum() float64 {
	if s.Weights == nil {
		return vec.Sum(s.Xs)
	}
	sum := 0.0
	for i, x := range s.Xs {
		sum += x * s.Weights[i]
	}
	return sum
}
예제 #2
0
// Weight returns the total weight of the Sasmple.
func (s Sample) Weight() float64 {
	if s.Weights == nil {
		return float64(len(s.Xs))
	}
	return vec.Sum(s.Weights)
}