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Nov 13, 2024
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doc: update analytics docs. #28754

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b8da108
Update 02-arima.md
hjxilinx Nov 12, 2024
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Update 02-arima.md
hjxilinx Nov 12, 2024
183c1ee
Update 02-anomaly-detection.md
hjxilinx Nov 12, 2024
947c03f
doc: update fig.
hjxilinx Nov 13, 2024
5b3e434
Merge branch 'doc/analysis' of github.com:taosdata/TDengine into doc/…
hjxilinx Nov 13, 2024
38f0d63
Update index.md
hjxilinx Nov 13, 2024
8dddbff
Update index.md
hjxilinx Nov 13, 2024
a186a08
Update 02-anomaly-detection.md
hjxilinx Nov 13, 2024
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Update 03-ad.md
hjxilinx Nov 13, 2024
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Update index.md
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Update index.md
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Update index.md
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@hjxilinx
hjxilinx authored Nov 13, 2024
commit a95e5e83e3e68b87c7c463c246bfae988931f8bb
4 changes: 2 additions & 2 deletions docs/zh/06-advanced/06-TDgpt/05-anomaly-detection/index.md
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Expand Up @@ -3,7 +3,7 @@ title: 异常检测算法
description: 异常检测算法
---

import ad from '../pic/ad.png';
import ad from '../pic/anomaly-detection.png';

时序数据异常检测，在TDengine 查询处理中以异常窗口的形式服务。因此，可以将异常检测获得的窗口视为一种特殊的**事件窗口**，区别在于异常窗口的触发条件和结束条件不是用户指定，而是检测算法自动识别。因此，可以应用在事件窗口上的函数均可应用在异常窗口中。由于异常检测结果是一个时间窗口，因此调用异常检测的方式也与使用事件窗口的方式相同，在 `WHERE` 子句中使用 `ANOMALY_WINDOW` 关键词即可调用时序数据异常检测服务，同时窗口伪列（`_WSTART`, `_WEND`, `_WDURATION`）也能够像其他窗口函数一样使用。例如：

Expand All @@ -13,7 +13,7 @@ FROM foo
ANOMALY_WINDOW(i32, "algo=iqr");
```

如下图所示，Anode 将返回时序数据异常窗口 [10:51:30, 10:53:40]
如下图所示，Anode 将返回时序数据异常窗口 $[10:51:30, 10:53:40]$

<img src={ad} width="760" alt="异常检测" />

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