# init(dictionaryLiteral:) Creates a data frame from a dictionary literal. ``` init(dictionaryLiteral elements: (String, [Any?])...) ``` ## Parameters `elements` A comma-separated, or variadic, list of tuples. Each tuple consists of two elements: - A string that represents a column’s name - An array that represents the elements for that column ## Discussion Don’t call this initializer directly. The compiler calls it to create a data frame from a dictionary literal. You create a dictionary literal by enclosing a comma-separated list of key-value pairs in square brackets. For example, this line creates a data frame with two columns and four rows: ```swift let dataFrame: DataFrame = ["a": [1, 2, 3, 5], "b": [1.414, 2.718, 3.14, 6.28]] ``` The initializer checks each column’s elements and, if possible, defines the column’s type to one of the following: - `Bool` - `Int` - `Float` - `Double` - `Date` - `String` - `Data` Otherwise, the data frame sets a column’s type to `Any`. > Note: Use ``doc://com.apple.TabularData/documentation/TabularData/DataFrame/append(column:)-aema`` to add a column of a specific type. --- 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)