# init(x:y:stacking:) Creates an area mark using the specified horizontal and vertical positions. ``` nonisolated init(x: PlottableValue, y: PlottableValue, stacking: MarkStackingMethod = .standard) where X : Plottable, Y : Plottable ``` ## Parameters `x` The horizontal position for the mark. `y` The vertical position for the mark. `stacking` The way in which the chart stacks area regions. The default is [`standard`](/documentation/Charts/MarkStackingMethod/standard). ## Discussion You can use this initializer to create a basic area chart: ``` Chart(cheeseburgerCost) { cost in AreaMark( x: .value("Date", cost.date), y: .value("Price", cost.price) ) } ``` The resulting chart automatically scales and labels the axes based on the data, and fills the area under the data points with a default color:  --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)