Recipe Step Parameters Expansion
Create a grid of parameter values from all combinations of lists supplied for steps of a preprocessing recipe.
expand_steps(..., random = FALSE)
... |
one or more lists containing parameter values over which to create
the grid. For each list an argument name should be given as the |
random |
number of points to be randomly sampled from the parameter grid
or |
RecipeGrid class object that inherits from data.frame.
library(recipes)
data(Boston, package = "MASS")
rec <- recipe(medv ~ ., data = Boston) %>%
step_corr(all_numeric(), -all_outcomes(), id = "corr") %>%
step_pca(all_numeric(), -all_outcomes(), id = "pca")
expand_steps(
corr = list(threshold = c(0.8, 0.9),
method = c("pearson", "spearman")),
pca = list(num_comp = 1:3)
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