---
title: "-(_:_:)"
framework: createml
role: symbol
role_heading: Operator
path: "createml/mluntypedcolumn/-(_:_:)-9gm9i"
---

# -(_:_:)

Creates a column by subtracting each element of the given column from the given value.

## Declaration

```swift
static func - (a: any MLDataValueConvertible, b: MLUntypedColumn) -> MLUntypedColumn
```

## Parameters

- `a`: An value.
- `b`: A column.

## Return Value

Return Value A new column if the column and value have the same underlying type; otherwise an invalid column.

## See Also

### Combining a value with a column to generate an untyped column

- [+(_:_:)](createml/mluntypedcolumn/+(_:_:)-miqp.md)
- [*(_:_:)](createml/mluntypedcolumn/*(_:_:)-7svdc.md)
- [/(_:_:)](createml/mluntypedcolumn/_(_:_:)-aw9o.md)