add_steps: Add Steps to Recipe

In gacolitti/tidyroll: Time-Series Prediction with Irregular Time Slices using Tidymodels

Description

Add one or more steps to the end of a recipe object in sequence.

Usage

add_steps(recipe, new_steps)

Arguments

recipe	A recipe.
new_steps	A series of step expressions. Use expr or exprs from rlang to defuse steps.

Examples

library(recipes)
library(rlang)

pred_date <- as.Date("2015-01-15")
mtcars2 <- mtcars %>% mutate(hp_date = as.Date("2015-01-01"))
mtcars2$hp_date[1:2] <- as.Date("2015-02-01")
rec1 <- recipe(mtcars2, mpg ~ hp + hp_date)
new_steps <- exprs(
   step_mutate(hp = ifelse(hp_date < pred_date, hp, as.numeric(NA))),
   step_meanimpute(hp)
)
rec2 <- add_steps(rec1, new_steps)

gacolitti/tidyroll documentation built on Sept. 13, 2020, 8 p.m.