category is a utility package for categorical vectors. It extends R factors with extra properties, that can be used to
switch easily between codes and labels of categories.
Currently category is not available from CRAN. The current development version can be installed using devtools.
library(devtools)
install_github("category", "edwindj")
library(category)
gender.categories <- data.frame( label = c("male", "female")
, code = c("M","F")
)
gender <- categorical( c("male", "male", "female", "male")
, cats=gender.categories
)
print(gender)## [1] male male female male
## Categories: male female
gender is a factor but has extra properties that can be used to recode or relabel this factor.
is.categorical(gender)## [1] TRUE
is.factor(gender)## [1] TRUE
categories(gender)## label code
## 1 male M
## 2 female F
relabel(gender, "code")## [1] M M F M
## Categories: M F
labels(gender)## [1] "male" "male" "female" "male"
labels(gender, "code")## [1] M M F M
## Levels: F M
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