tmwsum
语法
tmwsum(T, X, Y, window)
参数说明和窗口计算规则请参考：tmFunctions
详情
在给定长度（以时间长度衡量）的滑动窗口内，计算 X 和 Y 元素的内积。
例子
T = 1 1 1 1 2 5 6 8 9 10
X = 1..10
Y = double(1..10)\10
m = table(T as t,X as x, Y as y)
select *, tmwsum(t, y, x, 3) from m| t | x | y | tmwsum_t |
|---|---|---|---|
| 1 | 1 | 0.1 | 0.1 |
| 1 | 2 | 0.2 | 0.5 |
| 1 | 3 | 0.3 | 1.4 |
| 1 | 4 | 0.4 | 3 |
| 2 | 5 | 0.5 | 5.5 |
| 5 | 6 | 0.6 | 3.6 |
| 6 | 7 | 0.7 | 8.5 |
| 8 | 8 | 0.8 | 11.3 |
| 9 | 9 | 0.9 | 14.5 |
| 10 | 10 | 1 | 24.5 |
T = 2021.01.02 2021.01.06 join 2021.01.07..2021.01.14
X = 1..10
Y = double(1..10)\10
m=table(T as t,X as x, Y as y)
select *, tmwsum(t, y, x, 3) from m| t | x | y | tmwsum_t |
|---|---|---|---|
| 2021.01.02 | 1 | 0.1 | 0.1 |
| 2021.01.06 | 2 | 0.2 | 0.4 |
| 2021.01.07 | 3 | 0.3 | 1.3 |
| 2021.01.08 | 4 | 0.4 | 2.9 |
| 2021.01.09 | 5 | 0.5 | 5 |
| 2021.01.10 | 6 | 0.6 | 7.7 |
| 2021.01.11 | 7 | 0.7 | 11 |
| 2021.01.12 | 8 | 0.8 | 14.9 |
| 2021.01.13 | 9 | 0.9 | 19.4 |
| 2021.01.14 | 10 | 1 | 24.5 |
select *, tmwsum(t, y, x, 1w) from m| t | x | y | tmwsum_t |
|---|---|---|---|
| 2021.01.02 | 1 | 0.1 | 0.1 |
| 2021.01.06 | 2 | 0.2 | 0.5 |
| 2021.01.07 | 3 | 0.3 | 1.4 |
| 2021.01.08 | 4 | 0.4 | 3 |
| 2021.01.09 | 5 | 0.5 | 5.4 |
| 2021.01.10 | 6 | 0.6 | 9 |
| 2021.01.11 | 7 | 0.7 | 13.9 |
| 2021.01.12 | 8 | 0.8 | 20.3 |
| 2021.01.13 | 9 | 0.9 | 28 |
| 2021.01.14 | 10 | 1 | 37.1 |