# column(type:) Clones the column to a data column of the given type. ``` func column(type: T.Type) -> MLDataColumn? where T : MLDataValueConvertible ``` ## Parameters `type` A metatype used to create a new data column of that type. ## Return Value A new data column if the underlying type of the column is the same as `type`; otherwise `nil`. ## Discussion Use this method to create a typed copy of the column. For example, to create a data column of integers from an untyped column of integers, use [`column(type:)`](/documentation/CreateML/MLUntypedColumn/column(type:)) with `.self` as the argument for the `type` parameter. --- 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)