mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-24 16:42:05 +00:00
13 lines
449 B
Markdown
13 lines
449 B
Markdown
|
---
|
||
|
|
toc_priority: 107
|
||
|
|
---
|
||
|
|
|
||
|
|
# corr {#corrx-y}
|
||
|
|
|
||
|
|
Syntax: `corr(x, y)`
|
||
|
|
|
||
|
|
Calculates the Pearson correlation coefficient: `Σ((x - x̅)(y - y̅)) / sqrt(Σ((x - x̅)^2) * Σ((y - y̅)^2))`.
|
||
|
|
|
||
|
|
!!! 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 `corrStable` function. It works slower but provides a lower computational error.
|