# maximums(_:order:) Generates a data frame that contains the maximums of each group’s rows along a column you select by column identifier. ``` func maximums(_ columnID: ColumnID, order: Order? = nil) -> DataFrame where N : Comparable ``` ## Parameters `columnID` A column identifier. `order` A sorting order the method uses to sort the data frame by its maximum column. --- 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)