# 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) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.cloudfabrix.io/rda/rda-userguide/rda-data-management-cfxdm/cfxdm-dm-hist.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.