step_factor2string {recipes}R Documentation

Convert Factors to Strings

Description

step_factor2string will convert one or more factor vectors to strings.

Usage

step_factor2string(recipe, ..., role = NA, trained = FALSE,
  columns = FALSE)

## S3 method for class 'step_factor2string'
tidy(x, ...)

Arguments

recipe

A recipe object. The step will be added to the sequence of operations for this recipe.

...

One or more selector functions to choose which variables will converted to strings See selections() for more details. For the tidy method, these are not currently used.

role

Not used by this step since no new variables are created.

trained

A logical to indicate if the quantities for preprocessing have been estimated.

columns

A character string of variables that will be converted. This is NULL until computed by prep.recipe().

x

A step_factor2string object.

Details

prep has an option stringsAsFactors that defaults to TRUE. If this step is used with the default option, the string(s() produced by this step will be converted to factors after all of the steps have been prepped.

Value

An updated version of recipe with the new step added to the sequence of existing steps (if any). For the tidy method, a tibble with columns terms (the columns that will be affected).

See Also

step_string2factor() step_dummy()

Examples

data(okc)

rec <- recipe(~ diet + location, data = okc)

rec <- rec %>%
  step_string2factor(diet)

factor_test <- rec %>%
  prep(training = okc,
       stringsAsFactors = FALSE,
       retain = TRUE) %>%
  juice
# diet is a
class(factor_test$diet)

rec <- rec %>%
  step_factor2string(diet)

string_test <- rec %>%
  prep(training = okc,
       stringsAsFactors = FALSE,
       retain = TRUE) %>%
  juice
# diet is a
class(string_test$diet)

tidy(rec, number = 1)

[Package recipes version 0.1.1 Index]