Get the relational type of a relational operator.

rel.type gets the relational type of a relational operator. The relational type is one of 'gt', 'lt', 'eq', 'ne'.

rel.type(x)

Arguments

x

An operators expressed as a function or name

Value

character value of the operator. One of: 'gt', 'lt', 'eq', 'ne'.

Details

A relational operator is an operate that relates the relationship between arguments. The core relational operators are: >, >=, <, <=, ==, !=,

The relational.type is a simple roll-up of these operators. > and >= are gt, etc. The value is retrieved from .Options$operators[[x]][['rel.type']] and can be defined for relational operators using setOperator.

A relational type provides an indication of nature of the relational operator.

See also

operators, setOperator

Author

Christopher Brown

Examples

 if (FALSE) { # \dontrun{
  rel.type( `==` ) 
  rel.type( as.name('==') )
 } # }