# Matrix lattice: status grid linked to relation flows (Control-room concepts example)

> WestCoast Charts 1.1.5, release, public Core release, on npm. HTML: https://westcoast-charts.com/gallery/concepts/matrix-lattice/ · Index for agents: https://westcoast-charts.com/llms.txt

A service × cluster status grid (worst severity per cell, with glyphs so it reads without colour) is linked by crossfilter to severity and cause charts and to a cause › service › impact flow. Click a cell, a severity or a cause; everything else, the flow and the summary narrow to the matching signals. Esc or a summary chip clears.

## Question

Which service and cluster deserve investigation, and what is affected?

## How to read it

- Matrix: Start with the service × cluster overview.
- Linked views: The selected signals are reflected in the related summaries and flows.
- Details: Inspect the cause labels and related signals for that selection.

Try: Select Checkout × eu-west-2, then compare the filtered signals and related flows with the unfiltered overview.

- Chart composition: see the embedded example (interactive charts)
- Collection: Control-room concepts · Control-room concepts
- Standalone example: https://westcoast-charts.com/embed/samples/wcc/gallery/premium/concepts/matrix-lattice.html

## Setup

```js
import WestCoastCharts from 'west-coast-charts'
import types from 'west-coast-charts/types'
import premium from 'west-coast-charts/premium'
import readability from 'west-coast-charts/features/readability'
import link from 'west-coast-charts/features/link'

WestCoastCharts.use(types).use(premium).use(readability).use(link)
const WestCoastChartsPremium = premium
WestCoastCharts.setLicenseKey(LICENCE_KEY) // paid production licence; localhost evaluation needs no key
```

## Options

This example builds its charts with page controls and helpers, so there is no single options object. Read the standalone example for the source.

## Verify

- Text check (Library 1.1.5): load `west-coast-charts/agent/describe` and call `chart.describe({ format: "json" })` for the actual drawn state. The live reader is on this example’s HTML page.
- Command line (Public agent tools 0.2.3, tested with Library 1.1.5; available from the versioned GitHub release and npm, https://westcoast-charts.com/docs/cli/index.md): `wcc chart export concepts-matrix-lattice.json --out concepts-matrix-lattice.svg --with-table` (save the options above as JSON first)