func funcSumOverTime(vals []Value, args Expressions, enh *EvalNodeHelper) Vector {
	return aggrOverTime(vals, enh, func(values []Point) float64 {
		var sum float64
		for _, v := range values {
			sum += v.V
		}
		return sum
	})
}
func funcSumOverTime(vals []Value, args Expressions, enh *EvalNodeHelper) Vector {
	return aggrOverTime(vals, enh, func(values []Point) float64 {
		var sum float64
		for _, v := range values {
			sum += v.V
		}
		return sum
	})
}
func funcSumOverTime ( vals [ ] Value , args Expressions , enh * EvalNodeHelper ) Vector { return aggrOverTime ( vals , enh , func ( values [ ] Point ) float64 { var sum float64 for _ , v := range values { sum += v . V } return sum } ) }
// === sum_over_time(Matrix ValueTypeMatrix) Vector ===
=== sum_over_time ( Matrix ValueTypeMatrix ) Vector ===