# -(_:_:) Creates a column of doubles by subtracting each element of the given column from the given double. ``` static func - (a: Double, b: MLDataColumn) -> MLDataColumn ``` ## Parameters `a` A double. `b` A column of doubles. ## Return Value A new column of doubles. --- 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)