mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-21 09:10:48 +00:00
13 lines
429 B
Markdown
13 lines
429 B
Markdown
|
---
|
||
|
|
toc_priority: 37
|
||
|
|
---
|
||
|
|
|
||
|
|
# covarSamp {#covarsamp}
|
||
|
|
|
||
|
|
Calculates the value of `Σ((x - x̅)(y - y̅)) / (n - 1)`.
|
||
|
|
|
||
|
|
Returns Float64. When `n <= 1`, returns +∞.
|
||
|
|
|
||
|
|
!!! 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 `covarSampStable` function. It works slower but provides a lower computational error.
|