func NewGauge(opts Options) Gauge {
	return Gauge{
		Options: opts,
		max:     minFloat64,
		min:     math.MaxFloat64,
	}
}
NewGauge creates a new gauge.
package aggregation
import (
	"math"
	"github.com/m3db/m3metrics/aggregation"
)
const (
	minFloat64 = -math.MaxFloat64
)
type Gauge struct {
	Options
	last  float64
	sum   float64
	sumSq float64
	count int64
	max   float64
	min   float64
}