tmavg
语法
tmavg(T, X, window)
参数说明和窗口计算规则请参考：tmFunctions
详情
在给定长度（以时间 T 衡量）的滑动窗口内计算 X 元素的平均值。
例子
T = 1 1 1 2 5 6
X = 1 4 2 -1 2 4
m = table(T as t,X as x)
select *, tmavg(t, x, 3) from m| t | x | tmavg_t |
|---|---|---|
| 1 | 1 | 1 |
| 1 | 4 | 2.5 |
| 1 | 2 | 2.3333 |
| 2 | -1 | 1.5 |
| 5 | 2 | 2 |
| 6 | 4 | 3 |
T = 2021.01.02 2021.01.02 2021.01.04 2021.01.05 2021.01.07 2021.01.08
X = 1 4 2 -1 2 4
m = table(T as t,X as x)
select *, tmavg(t, x, 3d) from m| t | x | tmavg_t |
|---|---|---|
| 2021.01.02 | 1 | 1 |
| 2021.01.02 | 4 | 2.5 |
| 2021.01.04 | 2 | 2.3333 |
| 2021.01.05 | -1 | 0.5 |
| 2021.01.07 | 2 | 0.5 |
| 2021.01.08 | 4 | 3 |
select *, tmavg(t, x, 1w) from m| t | x | tmavg_t |
|---|---|---|
| 2021.01.02 | 1 | 1 |
| 2021.01.02 | 4 | 2.5 |
| 2021.01.04 | 2 | 2.3333 |
| 2021.01.05 | -1 | 1.5 |
| 2021.01.07 | 2 | 1.6 |
| 2021.01.08 | 4 | 2 |