{introverse} quick docs
as.factor()
get_help() docs
Description
The as.factor() function comes with R and is part of the Base R {base} package.
We use this function to coerce a value or variable array to be a factor, i.e. change the variable’s type into a factor type.
Conceptual Usage
as.factor(array to coerce into factor type)
as.factor(factor array to get factor of all its values)Examples
Some examples below use the carnivores dataset. Learn more about this dataset with get_help("carnivores").
# Show the carnivores dataset
carnivores## # A tibble: 9 × 4
## name genus awake brainwt
## <chr> <fct> <dbl> <dbl>
## 1 Arctic fox Vulpes 11.5 0.0445
## 2 Cheetah Acinonyx 11.9 NA
## 3 Dog Canis 13.9 0.07
## 4 Gray seal Haliochoerus 17.8 0.325
## 5 Jaguar Panthera 13.6 0.157
## 6 Lion Panthera 10.5 NA
## 7 Northern fur seal Callorhinus 15.3 NA
## 8 Red fox Vulpes 14.2 0.0504
## 9 Tiger Panthera 8.2 NA# Convert the character array to a factor array
as.factor( c("a", "b", "b", "c", "c", "c") )## [1] a b b c c c
## Levels: a b c
# Coerce the character `genus` column in carnivores into a factor column
carnivores$genus <- as.factor(carnivores$genus)# Coerce the character `genus` column in carnivores into a factor column using dplyr::mutate()
carnivores %>%
dplyr::mutate(genus = as.factor(genus))## # A tibble: 9 × 4
## name genus awake brainwt
## <chr> <fct> <dbl> <dbl>
## 1 Arctic fox Vulpes 11.5 0.0445
## 2 Cheetah Acinonyx 11.9 NA
## 3 Dog Canis 13.9 0.07
## 4 Gray seal Haliochoerus 17.8 0.325
## 5 Jaguar Panthera 13.6 0.157
## 6 Lion Panthera 10.5 NA
## 7 Northern fur seal Callorhinus 15.3 NA
## 8 Red fox Vulpes 14.2 0.0504
## 9 Tiger Panthera 8.2 NA