Applies to: ✅Azure Data Explorer✅Azure Monitor✅Microsoft Sentinel
Calculates the sample covariance of two random variables expr1 and expr2.
Null values are ignored and don't factor into the calculation.
The following formula is used:
注释
This function is used in conjunction with the summarize operator.
语法
covariance(
expr1, *expr2 )
Learn more about syntax conventions.
参数
| 名字 | 类型 | 必选 | DESCRIPTION |
|---|---|---|---|
| expr1 | real |
✔️ | First random variable expression. |
| expr2 | real |
✔️ | Second random variable expression. |
退货
Returns the covariance value of expr1 and expr2.
示例：
The example in this section shows how to use the syntax to help you get started.
datatable(x:real, y:real) [
1.0, 14.0,
2.0, 10.0,
3.0, 17.0,
4.0, 20.0,
5.0, 50.0,
]
| summarize covariance(x, y)
输出
| covariance_x_y |
|---|
| 20.5 |