recipes: step_naomit – R documentation

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step_naomit

Remove observations with missing values

Description

step_naomit creates a specification of a recipe step that will remove observations (rows of data) if they contain NA or NaN values.

Usage

step_naomit(
  recipe,
  ...,
  role = NA,
  trained = FALSE,
  columns = NULL,
  skip = FALSE,
  id = rand_id("naomit")
)

## S3 method for class 'step_naomit'
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 be used to remove observations containing `NA` or `NaN` values. See `selections()` for more details.
`role`	Unused, include for consistency with other steps.
`trained`	A logical to indicate if the quantities for preprocessing have been estimated. Again included for consistency.
`columns`	A character string of variable names that will be populated (eventually) by the `terms` argument.
`skip`	A logical. Should the step be skipped when the recipe is baked by `bake.recipe()`? While all operations are baked when `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.
`x`	A `step_naomit` object.

Value

An updated version of recipe with the new step added to the sequence of existing steps (if any).

Row Filtering

This step can entirely remove observations (rows of data), which can have unintended and/or problematic consequences when applying the step to new data later via bake.recipe(). Consider whether skip = TRUE or skip = FALSE is more appropriate in any given use case. In most instances that affect the rows of the data being predicted, this step probably should not be applied at all; instead, execute operations like this outside and before starting a preprocessing recipe().

Examples

recipe(Ozone ~ ., data = airquality) %>%
  step_naomit(Solar.R) %>%
  prep(airquality, verbose = FALSE) %>%
  bake(new_data = NULL)

recipes

Preprocessing Tools to Create Design Matrices

v0.1.16

MIT + file LICENSE

Authors

Max Kuhn [aut, cre], Hadley Wickham [aut], RStudio [cph]

Initial release