---
title: "-(_:_:)"
framework: createml
role: symbol
role_heading: Operator
path: "createml/mluntypedcolumn/-(_:_:)-4uigi"
---

# -(_:_:)

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

## Declaration

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

## Parameters

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

## 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 column with a value to generate an untyped column

- [+(_:_:)](createml/mluntypedcolumn/+(_:_:)-4vnbk.md)
- [*(_:_:)](createml/mluntypedcolumn/*(_:_:)-6gnlx.md)
- [/(_:_:)](createml/mluntypedcolumn/_(_:_:)-18srk.md)