# quantiles(_:quantile:order:) Generates a data frame that contains the quantiles of each group’s rows along a column you select by column identifier. ``` func quantiles(_ columnID: ColumnID, quantile: N, order: Order? = nil) -> DataFrame where N : BinaryFloatingPoint ``` ## Parameters `columnID` A column identifier. `quantile` A number between 0.0 and 1.0 that represents the percentage of the data that lies below the resulting value. `order` A sorting order the method uses to sort the data frame by its third quartile column. ## Discussion> Precondition: Quantile must be between 0.0 and 1.0. --- 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)