Factor/ordered factor S3 class
A factor is an integer with attribute
levels, a character vector. There
should be one level for each integer between 1 and
An ordered factor has the same properties as a factor, but possesses
an extra class that marks levels as having a total ordering.
new_factor(x = integer(), levels = character(), ..., class = character())
new_ordered(x = integer(), levels = character())
# S3 method for factor vec_ptype2(x, y, ...)
# S3 method for ordered vec_ptype2(x, y, ...)
# S3 method for factor vec_cast(x, to, ...)
# S3 method for ordered vec_cast(x, to, ...)
Integer values which index in to
Character vector of labels.
- ..., class
Used to for subclasses.
These functions help the base factor and ordered factor classes fit in to
the vctrs type system by providing constructors, coercion functions,
and casting functions.
new_ordered() are low-level
constructors - they only check that types, but not values, are valid, so
are for expert use only.