this.variance_=oldVariance+(x-oldMean)*(x-this.mean_);}}
merge(other){const result=new RunningStatistics();result.count_=this.count_+other.count_;result.sum_=this.sum_+other.sum_;result.min_=Math.min(this.min_,other.min_);result.max_=Math.max(this.max_,other.max_);if(result.count===0){result.mean_=0;result.variance_=0;result.meanlogs_=0;}else{result.mean_=result.sum/result.count;const deltaMean=(this.mean||0)-(other.mean||0);result.variance_=this.variance_+other.variance_+