tune_bayes() errors when tuning a recipe plus a finalized model #168
Description
The problem
I want to tune parameters of a recipe (e.g., step_poly(degree = tune())) and a model simultaneously.
This errors with tune_bayes(), when the model has parameters that need to be finalized (e.g., mtry) although I used update() or finalize() beforehand.
All other potential variations of the example below work as expected. For example, it works with tune_grid(), it works with min_n instead of mtry, and it works without the tuning parameter in the recipe.
Reproducible example
library("tidymodels")
#> -- Attaching packages -------------------------------------- tidymodels 0.0.3 --
#> v broom 0.5.4 v purrr 0.3.3
#> v dials 0.0.4 v recipes 0.1.9
#> v dplyr 0.8.4 v rsample 0.0.5
#> v ggplot2 3.2.1 v tibble 2.1.3
#> v infer 0.5.1 v yardstick 0.0.5
#> v parsnip 0.0.5
#> -- Conflicts ----------------------------------------- tidymodels_conflicts() --
#> x purrr::discard() masks scales::discard()
#> x dplyr::filter() masks stats::filter()
#> x dplyr::lag() masks stats::lag()
#> x ggplot2::margin() masks dials::margin()
#> x recipes::step() masks stats::step()
#> x recipes::yj_trans() masks scales::yj_trans()
library("tune")
library("workflows")
set.seed(2341)
ex_rec <- recipe(mpg ~ ., data = mtcars) %>%
step_poly(disp, degree = tune())
ex_vfold <- vfold_cv(mtcars, 3)
rf_model <-
rand_forest("regression", mtry = tune()) %>%
set_engine("ranger")
rf_wflow <-
workflow() %>%
add_model(rf_model) %>%
add_recipe(ex_rec)
rf_param <-
rf_wflow %>%
parameters() %>%
update(mtry = mtry(range = c(1L, 10L)),
degree = degree_int(range = c(1L, 4L)))
rf_param
#> Collection of 2 parameters for tuning
#>
#> id parameter type object class
#> mtry mtry nparam[+]
#> degree degree nparam[+]
rf_search <- tune_bayes(rf_wflow, initial = 2,
resamples = ex_vfold,
param_info = rf_param,
control = control_bayes(no_improve = 2))
#> Error: Some tuning parameters require finalization but there are recipe parameters
#> that require tuning. Please use `parameters()` to finalize the parameter ranges.Created on 2020-02-12 by the reprex package (v0.3.0)
Session info
devtools::session_info()
#> - Session info ---------------------------------------------------------------
#> setting value
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#> system x86_64, mingw32
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#> language (EN)
#> collate German_Germany.1252
#> ctype German_Germany.1252
#> tz Europe/Berlin
#> date 2020-02-12
#>
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