package mathext

func Sum(v []float64) float64 {
	total := float64(0)
	for _, v := range v {
		total += v
	}
	return total
}

func Mean(v []float64) float64 {
	return Sum(v) / float64(len(v))
}

func Median(v []float64) float64 {
	if len(v)%2 == 1 {
		return v[len(v)/2]
	} else {
		return (v[len(v)/2-1] + v[len(v)/2]) / float64(2)
	}
}

func Min(v []float64) float64 {
	r := v[0]
	for _, val := range v {
		if val < r {
			r = val
		}
	}
	return r
}

func Max(v []float64) float64 {
	r := v[0]
	for _, val := range v {
		if val > r {
			r = val
		}
	}
	return r
}