# PlottableValue Labeled data that you plot in a chart using marks. ``` struct PlottableValue where Value : Plottable ``` ## Overview Provide a `PlottableValue` to a `Mark` property (e.g., x, y, foregroundStyle) to plot data values with the mark property. > Important: The data type must conform to ``doc://com.apple.Charts/documentation/Charts/Plottable``. This is > a numeric value like a > or > > for quantitative data, > > for temporal data, or > > for categorical data. You can use the `.value("Category", \.category)` shorthand to create a `PlottableValue`. The example below plots category, value, and group with the bar mark’s x, y, and foregroundStyle. ```swift struct Bar { let category: String let value: Double let group: String } let data: [Bar] = [ Bar(category: "A", value: 20, group: "Group 1"), Bar(category: "A", value: 30, group: "Group 2"), Bar(category: "A", value: 10, group: "Group 3"), Bar(category: "B", value: 40, group: "Group 1"), Bar(category: "B", value: 20, group: "Group 2"), Bar(category: "B", value: 10, group: "Group 3"), //... ] var body: some View { Chart(data) { BarMark( x: .value("Category", $0.category), y: .value("Quantity", $0.value) ) .foregroundStyle(.value("Group", $0.group)) } } ``` --- 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)