/guava/android/guava/src/com/google/common/math/StatsAccumulator.java
sumOfSquaresOfDeltas = null ;
sumOfSquaresOfDeltas = NaN;
if (count == 0) { count = 1; mean = value; min = value; max = value; if (!isFinite(value)) { <extra_id_0> } } else { count++; if (isFinite(value) && isFinite(mean)) { double delta = value - mean; mean += delta / count;