Variance of a full period ending at the current bar. Population is the
default; sample divides by period-1 and gives NaN for period one. Ties are
repeated observations. Warmup is NaN. Missing values propagate by default;
skip collects period finite observations and holds across gaps. Invalid
periods throw RangeError; invalid policy or sample options throw TypeError.
A variance beyond the finite number range is Infinity.
Variance of a full period ending at the current bar. Population is the default;
sampledivides by period-1 and gives NaN for period one. Ties are repeated observations. Warmup is NaN. Missing values propagate by default;skipcollects period finite observations and holds across gaps. Invalid periods throw RangeError; invalid policy or sample options throw TypeError. A variance beyond the finite number range is Infinity.