# init(x:y:) Creates a point mark with fixed x position and plots values with y. ``` nonisolated init(x: CGFloat? = nil, y: PlottableValue) where Y : Plottable ``` ## Parameters `x` The x position. If `x` is `nil`, the bar will be centered horizontally by default. `y` The value plotted with y. ## Discussion ### Discussion Use this initializer to plot a property to y: ```swift Chart(data) { PointMark( y: .value("Weight", $0.weight) ) } ```  For more background, see the first example used in [`PointMark`](/documentation/Charts/PointMark) which shows the structure that contains the `weight` property. --- 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)