# Negative values (Radial Column example)

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

Net change per hour: losses grow inward from the zero ring, coloured by value.

- Chart type: `radialColumn` (Radial Column)
- Collection: Radial Column · Radial Column · Series, gauge & live
- Raw configuration: https://westcoast-charts.com/gallery-src/radial-column/negative.js
- Standalone example: https://westcoast-charts.com/embed/samples/wcc/premium/radial-column.html?only=negative

## Setup

```js
import WestCoastCharts from 'west-coast-charts'
import premium from 'west-coast-charts/premium'

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

## Options

```js
const options = {
  "chart": {
    "type": "radialColumn",
    "height": 460,
    "toolbar": {
      "show": false
    }
  },
  "series": [
    {
      "name": "Net change",
      "data": [
        12,
        18,
        -6,
        24,
        31,
        -14,
        -22,
        8,
        15,
        -9,
        27,
        35,
        -4,
        19,
        22,
        -17,
        11,
        28,
        -12,
        6,
        14,
        -3,
        20,
        26
      ]
    }
  ],
  "xaxis": {
    "categories": [
      "00:00",
      "01:00",
      "02:00",
      "03:00",
      "04:00",
      "05:00",
      "06:00",
      "07:00",
      "08:00",
      "09:00",
      "10:00",
      "11:00",
      "12:00",
      "13:00",
      "14:00",
      "15:00",
      "16:00",
      "17:00",
      "18:00",
      "19:00",
      "20:00",
      "21:00",
      "22:00",
      "23:00"
    ]
  },
  "plotOptions": {
    "radialColumn": {
      "fill": {
        "type": "value",
        "stops": [
          "#f43f5e",
          "#94a3b8",
          "#22c55e"
        ]
      }
    }
  }
}

const chart = new WestCoastCharts(document.querySelector('#chart'), options)
await chart.render()
```

## 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 radial-column-negative.json --out radial-column-negative.svg --with-table` (save the options above as JSON first)