---
title: "-=(_:_:)"
framework: tabulardata
role: symbol
role_heading: Operator
path: "tabulardata/discontiguouscolumnslice/-=(_:_:)-9nkq6"
---

# -=(_:_:)

Modifies a column slice by subtracting each value in a collection from the corresponding element in the column.

## Declaration

```swift
static func -= <C>(lhs: inout DiscontiguousColumnSlice<WrappedElement>, rhs: C) where WrappedElement : AdditiveArithmetic, WrappedElement == C.Element, C : Collection
```

## Parameters

- `lhs`: A column.
- `rhs`: A collection that contains elements of the same type as the column’s elements.

## See Also

### Modifying a Column Slice with a Collection of Values

- [+=(_:_:)](tabulardata/discontiguouscolumnslice/+=(_:_:)-2jxz1.md)
- [+=(_:_:)](tabulardata/discontiguouscolumnslice/+=(_:_:)-lpai.md)
- [-=(_:_:)](tabulardata/discontiguouscolumnslice/-=(_:_:)-8a20q.md)
- [*=(_:_:)](tabulardata/discontiguouscolumnslice/*=(_:_:)-9jg9h.md)
- [*=(_:_:)](tabulardata/discontiguouscolumnslice/*=(_:_:)-18nlr.md)
- [/=(_:_:)](tabulardata/discontiguouscolumnslice/_=(_:_:)-6xf9s.md)
- [/=(_:_:)](tabulardata/discontiguouscolumnslice/_=(_:_:)-1mzcg.md)
- [/=(_:_:)](tabulardata/discontiguouscolumnslice/_=(_:_:)-39wsi.md)
- [/=(_:_:)](tabulardata/discontiguouscolumnslice/_=(_:_:)-6lzj.md)