varSamp
Calculates the amount Σ((x - x̅)^2) / (n - 1)
, where n
is the sample size and x̅
is the average value of x
.
It represents an unbiased estimate of the variance of a random variable if passed values form its sample.
Returns Float64
. When n <= 1
, returns +∞
.
Note
This function uses a numerically unstable algorithm. If you need numerical stability in calculations, use the varSampStable
function. It works slower but provides a lower computational error.
当前内容版权归 ClickHouse 或其关联方所有,如需对内容或内容相关联开源项目进行关注与资助,请访问 ClickHouse .