Clean factor levels of data.table in-place

Finds all factors in a data.table and cleans factor levels to include only underscore symbols

Usage

dt_set_cleanfactorlevels(x, prefix_digits = NA)

Arguments

x

data.table: Input data.table. Will be modified in-place.

prefix_digits

Character: If not NA, add this prefix to all factor levels that are numbers

Value

Nothing, modifies x in-place.

Author

EDG

Examples

library(data.table)
x <- as.data.table(iris)
levels(x[["Species"]]) <- c("setosa:iris", "versicolor$iris", "virginica iris")
levels(x[["Species"]])
#> [1] "setosa:iris"     "versicolor$iris" "virginica iris" 
dt_set_cleanfactorlevels(x)
levels(x[["Species"]])
#> [1] "setosa_iris"     "versicolor_iris" "virginica_iris"