Package 'washoku'

Tokenization of Japanese character variables

Description

step_tokenize_jp() creates a specification of a recipe step that will convert a character predictor into a tokenlist_jp.

Usage

step_tokenize_jp(
  recipe,
  ...,
  role = NA,
  trained = FALSE,
  columns = NULL,
  engine = "sudachir",
  options = list(mode = "A", type = "surface", pos = TRUE, instance = NULL),
  skip = FALSE,
  id = rand_id("tokenize_jp")
)

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 are affected by the step. See recipes::selections() for more details.
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 variable names that will be populated (eventually) by the terms argument. This is NULL until the step is trained by recipes::prep.recipe().
engine	Implement token engine package. Defaults to 'sudachir'.
options	list. path to engine's function.
skip	A logical. Should the step be skipped when the recipe is baked by recipes::bake.recipe()? While all operations are baked when recipes::prep.recipe() is run, some operations may not be able to be conducted on new data (e.g. processing the outcome variable(s)). Care should be taken when using skip = FALSE.
id	A character string that is unique to this step to identify it.

Details

The following packages are available for the engine.

• sudachir (Sudachi)

• RcppMeCab (MeCab)

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Token list for Japanese character

Description

Token list for Japanese character

Usage

tokenlist_jp(tokens = list())

Arguments

tokens

list

Examples

## Not run: 
tokens <- list(purrr::set_names(c(intToUtf8(c(26519, 27278))),
               c(intToUtf8(c(21517, 35422)))))
tokenlist_jp(tokens)

## End(Not run)

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