# init(column:) Creates a new column of machine learning sequences from a given column whose elements can be converted to sequences. ``` init(column: MLDataColumn) where T : MLDataValueConvertible ``` ## Parameters `column` An [`MLDataColumn`](/documentation/CreateML/MLDataColumn) of elements convertible to [`MLDataValue.SequenceType`](/documentation/CreateML/MLDataValue/SequenceType). ## Discussion Use this initializer to create a column of sequences from another column. Start by creating a column that is convertible to a column of sequences. ```swift let intSequenceString = "[1, 2, 3]" let intSequenceString2 = "[4, 5, 6]" let stringsColumn = MLDataColumn([intSequenceString, intSequenceString2]) print(stringsColumn) // Prints "[1, 2, 3]", "[4, 5, 6]"] ``` Then use [`init(column:)`](/documentation/CreateML/MLDataColumn/init(column:)-855l9) to convert the column to a column of sequences. ```swift let sequenceColumn = MLDataColumn(column: stringsColumn) print(sequenceColumn) // Prints [[DataValue(1), DataValue(2), DataValue(3)], // [DataValue(4), DataValue(5), DataValue(6)]] ``` --- 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)