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% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/shuffle.R
\name{step_shuffle}
\alias{step_shuffle}
\alias{tidy.step_shuffle}
\title{Shuffle Variables}
\usage{
step_shuffle(
recipe,
...,
role = NA,
trained = FALSE,
columns = NULL,
skip = FALSE,
id = rand_id("shuffle")
)
\method{tidy}{step_shuffle}(x, ...)
}
\arguments{
\item{recipe}{A recipe object. The step will be added to the
sequence of operations for this recipe.}
\item{...}{One or more selector functions to choose which
variables will be permuted. See \code{\link[=selections]{selections()}} for more
details. For the \code{tidy} method, these are not
currently used.}
\item{role}{Not used by this step since no new variables are
created.}
\item{trained}{A logical to indicate if the quantities for
preprocessing have been estimated.}
\item{columns}{A character string that contains the names of
columns that should be shuffled. These values are not determined
until \code{\link[=prep.recipe]{prep.recipe()}} is called.}
\item{skip}{A logical. Should the step be skipped when the
recipe is baked by \code{\link[=bake.recipe]{bake.recipe()}}? While all operations are baked
when \code{\link[=prep.recipe]{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 \code{skip = TRUE} as it may affect
the computations for subsequent operations}
\item{id}{A character string that is unique to this step to identify it.}
\item{x}{A \code{step_shuffle} object.}
}
\value{
An updated version of \code{recipe} with the new step
added to the sequence of existing steps (if any). For the
\code{tidy} method, a tibble with columns \code{terms} which
is the columns that will be affected.
}
\description{
\code{step_shuffle} creates a \emph{specification} of a recipe
step that will randomly change the order of rows for selected
variables.
}
\examples{
integers <- data.frame(A = 1:12, B = 13:24, C = 25:36)
library(dplyr)
rec <- recipe(~ A + B + C, data = integers) \%>\%
step_shuffle(A, B)
rand_set <- prep(rec, training = integers)
set.seed(5377)
bake(rand_set, integers)
tidy(rec, number = 1)
tidy(rand_set, number = 1)
}
\concept{permutation}
\concept{preprocessing}
\concept{randomization}
\keyword{datagen}
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