Update, clarify supported regex#2888
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mdlinville
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Jul 9, 2026
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| ### Multi-metric panel expressions | ||
| Use a regular expression to create a single line plot that shows multiple metrics together (including matching metrics logged in the future). For detailed instructions, see [Add a line plot](/models/app/features/panels/line-plot#multi-metric-line-plot). | ||
| Use a regular expression to create a single line plot that shows multiple metrics together (including matching metrics logged in the future). Use [Google's RE2 syntax](https://github.com/google/re2/wiki/Syntax) when defining a regular expression. |
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Asked in https://weightsandbiases.slack.com/archives/C07JHLX0HJ5/p1783634371208349 to confirm.
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| - **Filter to one user's runs**: Include only runs created by the specified user. Click the toggle to turn on the filter, then specify a username. | ||
| - **Filter on run name**: Include only runs whose names match the given regular expression. Click the toggle to turn on the filter, then specify a regular expression. | ||
| - **Filter on run name**: Include only runs whose names match the given regular expression. Click the toggle to turn on the filter, then specify a regular expression. Use [Google's RE2 syntax](https://github.com/google/re2/wiki/Syntax) when defining regular expressions. |
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Asked in https://weightsandbiases.slack.com/archives/C05754EPT26/p1783634464547559 to confirm
| - **Star panels**: See your most important panels at a glance. When viewing a run or a project, click the star icon at the top of a panel to star it. To filter the list to only starred panels, click the **Starred** tab at the top of the list. | ||
| - **Star metrics**: When viewing an important metric in detail view, click the star icon to star it. | ||
| - **Search panels**: When viewing a run or a project, use the **panel search** field at the bottom of the screen to filter which runs appear in each chart. You can search with [JavaScript regular expressions](https://www.w3schools.com/js/js_regexp.asp) to match patterns in run names. | ||
| - **Search panels**: When viewing a run or a project, use the **panel search** field at the bottom of the screen to filter which runs appear in each chart. You can search with [RE2 syntax](https://github.com/google/re2/wiki/Syntax) to match patterns in run names. |
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Asked in https://coreweave.slack.com/archives/C096L6W1N72/p1783634649531969 to confirm
mdlinville
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Jul 9, 2026
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| ### Multi-metric panel expressions | ||
| Use a regular expression to create a single line plot that shows multiple metrics together (including matching metrics logged in the future). For detailed instructions, see [Add a line plot](/models/app/features/panels/line-plot#multi-metric-line-plot). | ||
| Use a regular expression to create a single line plot that shows multiple metrics together (including matching metrics logged in the future). Use [Google's RE2 syntax](https://github.com/google/re2/wiki/Syntax) when defining a regular expression. |
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| 1. To add a custom line plot instead, click **Line plot**. | ||
| 1. Configure the line plot's data, grouping, and display preferences using the corresponding tabs. For details, see [Edit line plot settings](#edit-line-plot-settings). | ||
| 1. To add calculated expressions to the x-axis or y-axis, click **Expressions**. [JavaScript regular expressions](https://www.w3schools.com/js/js_regexp.asp) are supported. | ||
| 1. To add calculated expressions to the x-axis or y-axis, click **Expressions**. Use [Google's RE2 syntax](https://github.com/google/re2/wiki/Syntax) when defining regular expressions. |
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Description
Eng is moving to Clickhouse as a backend for run metadata querying filtering etc. Clickhouse only supports a subset of regexes, called RE2
This PR attempts to clarify that W&B (will) only support RE2.