# map(to:) Creates a new column by converting this column to the given type. ``` func map(to type: T.Type) -> MLDataColumn where T : MLDataValueConvertible ``` ## Parameters `type` A type of [`MLDataColumn`](/documentation/CreateML/MLDataColumn) to convert the contents of the column to, using [`MLDataValueConvertible`](/documentation/CreateML/MLDataValueConvertible). ## Return Value A new column. ## Discussion This method is functionally equivalent to the initializers of [`MLDataColumn`](/documentation/CreateML/MLDataColumn) that have one parameter `column`, such as [`init(column:)`](/documentation/CreateML/MLDataColumn/init(column:)-86ge9). --- 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)