mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-11 17:02:25 +00:00
28 lines
670 B
Markdown
28 lines
670 B
Markdown
---
|
|
sidebar_position: 154
|
|
---
|
|
|
|
# kurtSamp {#kurtsamp}
|
|
|
|
Computes the [sample kurtosis](https://en.wikipedia.org/wiki/Kurtosis) of a sequence.
|
|
|
|
It represents an unbiased estimate of the kurtosis of a random variable if passed values form its sample.
|
|
|
|
``` sql
|
|
kurtSamp(expr)
|
|
```
|
|
|
|
**Arguments**
|
|
|
|
`expr` — [Expression](../../../sql-reference/syntax.md#syntax-expressions) returning a number.
|
|
|
|
**Returned value**
|
|
|
|
The kurtosis of the given distribution. Type — [Float64](../../../sql-reference/data-types/float.md). If `n <= 1` (`n` is a size of the sample), then the function returns `nan`.
|
|
|
|
**Example**
|
|
|
|
``` sql
|
|
SELECT kurtSamp(value) FROM series_with_value_column;
|
|
```
|