R: invert

invert {formula.tools} | R Documentation

## invert

### Description

Invert the operators in an object, usually a formula or expression

### Usage

    invert(x, ...)

    ## S4 method for signature 'call'
    invert(x)

    ## S4 method for signature 'expression'
    invert(x)

### Arguments

`x` | function for invert
`...` | additional arguments passed other functions `invert` is a S4 generic method for inverting relational operators, i.e. functions prefixed with a `.` are not exported and should probably not be called directly

### Value

The operand is returned with the relational operators inverted.

### Author(s)

Christopher Brown

### See Also

`op`, `op.type`

### Examples

      invert( quote( A >  5 ) )
      invert( quote( A >= 5 ) )
      invert( quote( A <  5 ) )
      invert( quote( A <= 5 ) )
      invert( quote( A == 5 ) )
      invert( quote( A != 5 ) )
      invert( quote( A %in% lettters[1:5] ) )
      invert( quote( A %!in% letters[1:5] ) )

[Package formula.tools version 1.7.1 Index]