%ein% {hutils}

Exists and (not) in

Description

A common blunder in R programming is to mistype one of a set of filters without realizing. This function will error if any member of the values to be matched against is not present.

Usage

lhs %ein% rhs

lhs %enotin% rhs

Arguments

lhs

Values to be matched

rhs

Values to be matched against.

Value

Same as %in% and %notin%, unless an element of rhs is not present in lhs, in which case, an error.

Examples

# Incorrectly assumed to include two Species
iris[iris$Species %in% c("setosa", "versicolour"), ]
## Not run: 
# Error:
iris[iris$Species %ein% c("setosa", "versicolour"), ]

## End(Not run)