recipes (version 0.1.0)

step_hyperbolic: Hyperbolic Transformations

Description

step_hyperbolic creates a specification of a recipe step that will transform data using a hyperbolic function.

Usage

step_hyperbolic(recipe, ..., role = NA, trained = FALSE, func = "sin",
  inverse = TRUE, columns = NULL)

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 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.

func

A character value for the function. Valid values are "sin", "cos", or "tan".

inverse

A logical: should the inverse function be used?

columns

A character string of variable names that will be (eventually) populated by the terms argument.

Value

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

See Also

step_logit step_invlogit step_log step_sqrt recipe prep.recipe bake.recipe

Examples

# NOT RUN {
set.seed(313)
examples <- matrix(rnorm(40), ncol = 2)
examples <- as.data.frame(examples)

rec <- recipe(~ V1 + V2, data = examples)

cos_trans <- rec  %>%
  step_hyperbolic(all_predictors(),
                  func = "cos", inverse = FALSE)

cos_obj <- prep(cos_trans, training = examples)

transformed_te <- bake(cos_obj, examples)
plot(examples$V1, transformed_te$V1)
# }