mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-23 16:12:01 +00:00
13 lines
497 B
Markdown
13 lines
497 B
Markdown
|
---
|
||
|
|
toc_priority: 32
|
||
|
|
---
|
||
|
|
|
||
|
|
# varPop(x) {#varpopx}
|
||
|
|
|
||
|
|
Calculates the amount `Σ((x - x̅)^2) / n`, where `n` is the sample size and `x̅`is the average value of `x`.
|
||
|
|
|
||
|
|
In other words, dispersion for a set of values. Returns `Float64`.
|
||
|
|
|
||
|
|
!!! note "Note"
|
||
|
|
This function uses a numerically unstable algorithm. If you need [numerical stability](https://en.wikipedia.org/wiki/Numerical_stability) in calculations, use the `varPopStable` function. It works slower but provides a lower computational error.
|