!! Convert all character variables to factors

A convenience function to convert all character variables in a data frame to factor variables.

all_chr_to_factor(data)

Arguments

data	A data frame.

Value

A data frame with character variables converted to factors.

Examples

library(biostat)
data(PlantGrowth)


# Basic syntax
PlantGrowth <- all_chr_to_factor(PlantGrowth)


# Update the same object using operator from `magrittr` package
library(magrittr)
PlantGrowth %<>% all_chr_to_factor()


# Create a data frame
df <- data.frame(
  letters = letters[1:5],
  letters2 = LETTERS[1:5],
  stringsAsFactors = FALSE
)

mapply(class, df) # show classes of columns
#>     letters    letters2 
#> "character" "character" 

# Convert all character variables to strings
df2 <- all_chr_to_factor(df)

# Check the classes in each column
mapply(class, df2)
#>  letters letters2 
#> "factor" "factor" 

# # Works with tibbles too
# tbl  <- tibble::as.tibble(df)
# tbl2 <- all_chr_to_factor(tbl)
# mapply(class, tbl2)
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# v0.3.1: