> For the complete documentation index, see [llms.txt](https://docs.cloudfabrix.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cloudfabrix.io/rda/rda-userguide/rda-data-management-cfxdm/cfxdm-dm-hist.md).

# cfxdm - dm:hist

**dm:hist:** This cfxdm tag allows the user to generate an histogram out of timeseries data from a selected extension's tag.

**dm:hist** syntax**:**

* **timestamp (mandatory):** select timestamp column from the selected extension's tag.
* **interval (mandatory):** select the interval in days or hours or minutes or seconds. (Ex: 1d (day), 4h (hour), 15min (minutes), 30s (seconds) 

In the below example, for a reference, we are going to use **Elasticsearch** as an extension to query the timeseries data index (or indexes) and ingest it into **dm:hist** to generate an histogram.

Enter the below command to select **Elasticsearch's index tag (#es124111:winlog-events**). (In this example, **es124111** name is used as a label to identify Elasticsearch extension, and **winlog-events** representing Windows log events indexes with Elasticsearch extension as a tag. The label is defined while adding the extension in cfxdx configuration file or through UI or CLI)

```
tag #es124111:winlog-events
```

![](/files/-MVxKLt997lMZ45Va0qk)

**Example 1:** Select log events as timeseries data and generate an histogram

Get timeseries data out of Windows log events from Elasticsearch tag for last 10 hours with an interval of 1 hour and generate an histogram.

**Timestamp Column:**

* **@timestamp**

```
data `@timestamp` after -10 hour --> dm:hist timestamp = '@timestamp' & interval = '1h'
```

![](/files/-MVxNAwU4oQvLxMNIo_F)


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