# automatic(includesZero:reversed:dataType:modifyInferredDomain:) Creates a scale domain configuration that infers the scale domain from data. ``` static func automatic(includesZero: Bool? = nil, reversed: Bool? = nil, dataType: DataValue.Type, modifyInferredDomain: @escaping (inout [DataValue]) -> Void) -> AutomaticScaleDomain where DataValue : Plottable ``` ## Parameters `includesZero` Whether the scale domain should include zero (only applicable for numerical values). `reversed` Whether the scale domain should be reversed (e.g., 100 … 0). `dataType` The type of a data value in the domain. `modifyInferredDomain` A closure that modifies the automatically inferred domain. ## Discussion You can modify the inferred scale domain with a function. For instance, you can sort the categories in a categorical x scale: ``` Chart { ... } .chartXScale(domain: .automatic(dataType: String.self) { domain in // Sort the categories. domain.sort(using: .localizedStandard) // Include a new category. domain.append("Other") } ``` You can also modify a numerical scale to include a given value. The example below sets the y scale to always include the value 100. ``` Chart { ... } .chartYScale(domain: .automatic(dataType: Double.self) { domain in domain.append(100) } ``` Note that the `modifyInferredDomain` closure is used as part of the automatic scale domain inference process. The result of it can be further modified by the `reversed` parameter, and to include values from axis marks. To set the scale domain to an exact value, specify the value as the `domain:` argument directly instead of using `.automatic`. --- 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)