workflow-map.md
In workflowsets: Create a Collection of 'tidymodels' Workflows

basic mapping

Code
  workflow_map(two_class_set, "foo", seed = 1, resamples = folds, grid = 2)
Condition
  Error in `workflow_map()`:
  ! `fn` must be one of "tune_grid", "tune_bayes", "fit_resamples", "tune_race_anova", "tune_race_win_loss", "tune_sim_anneal", or "tune_cluster", not "foo".

Code
  workflow_map(two_class_set, fn = 1L, seed = 1, resamples = folds, grid = 2)
Condition
  Error in `workflow_map()`:
  ! `fn` must be a character vector, not the number 1.

Code
  workflow_map(two_class_set, fn = tune::tune_grid, seed = 1, resamples = folds,
  grid = 2)
Condition
  Error in `workflow_map()`:
  ! `fn` must be a character vector, not a function.

map logging

Code
  cat(logging_res, sep = "\n")
Output
  i No tuning parameters. `fit_resamples()` will be attempted
  i 1 of 3 resampling: reg_lm
  i 2 of 3 tuning:     reg_knn
  i No tuning parameters. `fit_resamples()` will be attempted
  i 3 of 3 resampling: nonlin_lm

failers

Code
  res_loud <- workflow_map(car_set_3, resamples = folds, seed = 2, verbose = TRUE,
    grid = "a")
Message
  i 1 of 2 tuning:     reg_knn
  x 1 of 2 tuning:     reg_knn failed with: Error in check_grid(grid = grid, workflow = workflow, pset = pset) :   `grid` should be a positive integer or a data frame.
  i No tuning parameters. `fit_resamples()` will be attempted
  i 2 of 2 resampling: reg_lm
  v 2 of 2 resampling: reg_lm (ms)

fail informatively on mismatched spec/tuning function

Code
  workflow_map(wf_set_1, resamples = folds)
Condition
  Error in `workflow_map()`:
  ! To tune with `tune_grid()`, each workflow's model specification must inherit from <model_spec>, but `reg_km` does not.
  i The workflow `reg_km` is a cluster specification. Did you intend to set `fn = 'tune_cluster'`?

Code
  workflow_map(wf_set_2, resamples = folds)
Condition
  Error in `workflow_map()`:
  ! To tune with `tune_grid()`, each workflow's model specification must inherit from <model_spec>, but `reg_km` and `reg_hc` do not.
  i The workflows `reg_km` and `reg_hc` are cluster specifications. Did you intend to set `fn = 'tune_cluster'`?

Code
  workflow_map(wf_set_1, resamples = folds, fn = "tune_cluster")
Condition
  Error in `workflow_map()`:
  ! To tune with `tune_cluster()`, each workflow's model specification must inherit from <cluster_spec>, but `reg_dt` does not.

Code
  workflow_map(wf_set_3, resamples = folds, fn = "tune_cluster")
Condition
  Error in `workflow_map()`:
  ! To tune with `tune_cluster()`, each workflow's model specification must inherit from <cluster_spec>, but `reg_dt` and `reg_nn` do not.