40     numsamples_ = 1;  in Stat1()
54     numsamples_ = w;  in Stat1()
60     numsamples_ = stat.numsamples_;  in Stat1()
64     numsamples_ = NumType();  in Clear()
71     numsamples_ = stat.numsamples_;
78     numsamples_ += stat.numsamples_;
85     numsamples_ -= stat.numsamples_;
92     numsamples_ *= k;
106   NumType numSamples() const { return numsamples_; }  in numSamples()
113     if (numsamples_ == 0) return VType();  in Mean()
114     return sum_ * (1.0 / numsamples_);  in Mean()
120     if (numsamples_ == 0) return VType();  in Mean()
121     VType mean = sum_ * (1.0 / numsamples_);  in Mean()
123       VType avg_squares = sum_squares_ * (1.0 / numsamples_);  in Mean()
131     if (numsamples_ == 0) return VType();  in StdDev()
133     VType avg_squares = sum_squares_ * (1.0 / numsamples_);  in StdDev()
144   NumType numsamples_;  // sum of weight[i];  variable