Linear Radial Axis

The following additional configuration options are provided by the radial linear scale.

Namespace:

Namespace: options.scales[scaleId]

Name	Type	Default	Description
`type`	`string`		Type of scale being employed. Custom scales can be created and registered with a string key. This allows changing the type of an axis for a chart.
`alignToPixels`	`boolean`	`false`	Align pixel values to device pixels.
`backgroundColor`			Background color of the scale area.
`display`	`boolean`\|`string`	`true`	Controls the axis global visibility (visible when `true`, hidden when `false`). When `display: ‘auto’`, the axis is visible only if at least one associated dataset is visible.
`grid`	`object`		Grid line configuration. more…
`min`	`number`		User defined minimum number for the scale, overrides minimum value from data.
`max`	`number`		User defined maximum number for the scale, overrides maximum value from data. more…
`reverse`	`boolean`	`false`	Reverse the scale.
`stacked`	`boolean`\|`string`	`false`	Should the data be stacked.
`suggestedMax`	`number`		Adjustment used when calculating the maximum data value. more…
`suggestedMin`	`number`		Adjustment used when calculating the minimum data value.
`ticks`	`object`		Tick configuration. more…
`weight`	`number`	`0`	The weight used to sort the axis. Higher weights are further away from the chart area.

Tick Configuration

Namespace: options.scales[scaleId].ticks

Name	Type	Scriptable	Default	Description
`backdropColor`	Color	Yes	`‘rgba(255, 255, 255, 0.75)’`	Color of label backdrops.
`backdropPadding`			`2`	Padding of label backdrop.
`callback`	`function`			Returns the string representation of the tick value as it should be displayed on the chart. See callback.
`display`	`boolean`		`true`	If true, show tick labels.
`color`		Yes	`Chart.defaults.color`	Color of ticks.
`font`	`Font`	Yes	`Chart.defaults.font`	See Fonts
`major`	`object`		`{}`	.
`padding`	`number`		`3`	Sets the offset of the tick labels from the axis
`showLabelBackdrop`	`boolean`	Yes	`true` for radial scale, `false` otherwise	If true, draw a background behind the tick labels.
`textStrokeColor`	Color	Yes	``	The color of the stroke around the text.
`textStrokeWidth`	`number`	Yes	`0`	Stroke width around the text.
`z`	`number`		`0`	z-index of tick layer. Useful when ticks are drawn on chart area. Values <= 0 are drawn under datasets, > 0 on top.

Namespace: options.scales[scaleId].grid, it defines options for the grid lines of the axis.

The scriptable context is described in Options section.

Axis Range Settings

Given the number of axis range settings, it is important to understand how they all interact with each other.

The suggestedMax and suggestedMin settings only change the data values that are used to scale the axis. These are useful for extending the range of the axis while maintaining the auto fit behaviour.

In this example, the largest positive value is 50, but the data maximum is expanded out to 100. However, because the lowest data value is below the suggestedMin setting, it is ignored.

If set, the scale ticks will be enumerated by multiple of stepSize, having one tick per increment. If not set, the ticks are labeled automatically using the nice numbers algorithm.

This example sets up a chart with a y axis that creates ticks at 0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5.

Angle Line Options

The following options are used to configure angled lines that radiate from the center of the chart to the point labels. Namespace: options.scales[scaleId].angleLines

Name	Type	Scriptable	Default	Description
`display`	`boolean`		`true`	If true, angle lines are shown.
`color`	Color	Yes	`Chart.defaults.borderColor`	Color of angled lines.
`lineWidth`	`number`	Yes	`1`	Width of angled lines.
`borderDash`	`number[]`	Yes¹	`[]`	Length and spacing of dashes on angled lines. See .
`borderDashOffset`	`number`	Yes	`0.0`	Offset for line dashes. See MDN (opens new window).

the borderDash setting only accepts a static value or a function. Passing an array of arrays is not supported.

The scriptable context is described in section.

The following options are used to configure the point labels that are shown on the perimeter of the scale. Namespace: options.scales[scaleId].pointLabels

Internal data format

Internally, the linear radial scale uses numeric data