Module factors 

Factor builtins — factor construction, levels, and nlevels.

A factor is an integer vector with a “levels” attribute (character) and class “factor” (or c(“ordered”, “factor”) if ordered).

Statics

__BUILTIN_REG_BUILTIN_FACTOR 🔒

__BUILTIN_REG_BUILTIN_LEVELS 🔒

__BUILTIN_REG_BUILTIN_NLEVELS 🔒

__BUILTIN_REG_BUILTIN_ORDERED 🔒

Functions

builtin_factor 🔒

Encode a vector as a factor (categorical variable).

builtin_levels 🔒

levels(x) — get the levels of a factor.

builtin_nlevels 🔒

nlevels(x) — number of levels of a factor.

builtin_ordered 🔒

Construct an ordered factor.

rvalue_to_char_vec 🔒

Coerce an RValue to a character vector for level matching.