# init(x:yStart:yEnd:width:) Creates a bar mark that plots values with x and its y interval. ``` nonisolated init(x: PlottableValue, yStart: PlottableValue, yEnd: PlottableValue, width: MarkDimension = .automatic) where X : Plottable, Y : Plottable ``` ## Parameters `x` The value plotted with x. `yStart` The value plotted with y start. `yEnd` The value plotted with y end. `width` The bar width. If `width` is `nil`, the default bar size will be applied. ## Discussion ### Discussion Use this initializer to show vertical intervals for one or more categories: ```swift Chart(data) { BarMark( x: .value("Job", $0.job), yStart: .value("Start Time", $0.start), yEnd: .value("End Time", $0.end) ) } ```  --- 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)