---
title: "init(angle:innerRadius:outerRadius:angularInset:)"
framework: charts
role: symbol
role_heading: Initializer
path: "charts/sectormark/init(angle:innerradius:outerradius:angularinset:)"
---

# init(angle:innerRadius:outerRadius:angularInset:)

Creates a sector mark, which uses the angular size to represent the proportion of the value to the sum of all values.

## Declaration

```swift
nonisolated init(angle: PlottableValue<some Plottable>, innerRadius: MarkDimension = .automatic, outerRadius: MarkDimension = .automatic, angularInset: CGFloat? = nil)
```

## Parameters

- `angle`: A plottable value that will map to the angular size of the sector. It’s either a value that the angle within the full circle will be proportional with, or a value range for explicit start/end angles.
- `innerRadius`: The inner radius of the sector. It is either a size in points, or a .ratio or .inset relative to the outer radius.
- `outerRadius`: The outer radius of the sector. It is either a size in points, or a .ratioor .inset relative to the available plot area.
- `angularInset`: A radius for the corners of the sector.

## Discussion

Discussion Use this initializer to map angular positions to a sector for each data element.