tests/testthat/_snaps/ica.md

In tidymodels/recipes: Preprocessing and Feature Engineering Steps for Modeling

No ICA comps

Code
  print(ica_extract_trained)
Message

  -- Recipe ----------------------------------------------------------------------

  -- Inputs 
  Number of variables by role
  outcome:   1
  predictor: 5

  -- Training information 
  Training data contained 456 data points and no incomplete rows.

  -- Operations 
  * Centering and scaling for: carbon, hydrogen, oxygen, ... | Trained
  * No ICA components were extracted from: carbon and hydrogen, ... | Trained

check_name() is used

Code
  prep(rec, training = dat)
Condition
  Error in `step_ica()`:
  Caused by error in `bake()`:
  ! Name collision occurred. The following variable names already exist:
  * `IC1`

rethrows error correctly from implementation

Code
  recipe(~., data = mtcars) %>% step_ica(all_predictors()) %>% prep()
Condition
  Error in `step_ica()`:
  Caused by error in `prep()`:
  x Failed with error:
  i Error in fastICA::fastICA(n.comp = 5, X = as.matrix(training[, col_names]), : mocked error

bake method errors when needed non-standard role columns are missing

Code
  bake(ica_extract_trained, new_data = biomass_tr[, c(-3)])
Condition
  Error in `step_ica()`:
  ! The following required column is missing from `new_data`: carbon.

empty printing

Code
  rec
Message

  -- Recipe ----------------------------------------------------------------------

  -- Inputs 
  Number of variables by role
  outcome:    1
  predictor: 10

  -- Operations 
  * ICA extraction with: <none>

Code
  rec
Message

  -- Recipe ----------------------------------------------------------------------

  -- Inputs 
  Number of variables by role
  outcome:    1
  predictor: 10

  -- Training information 
  Training data contained 32 data points and no incomplete rows.

  -- Operations 
  * ICA extraction with: <none> | Trained

keep_original_cols - can prep recipes with it missing

Code
  rec <- prep(rec)
Condition
  Warning:
  `keep_original_cols` was added to `step_ica()` after this recipe was created.
  i Regenerate your recipe to avoid this warning.

printing

Code
  print(rec)
Message

  -- Recipe ----------------------------------------------------------------------

  -- Inputs 
  Number of variables by role
  outcome:   1
  predictor: 5

  -- Operations 
  * Centering and scaling for: all_predictors()
  * ICA extraction with: carbon and hydrogen

Code
  prep(rec)
Message

  -- Recipe ----------------------------------------------------------------------

  -- Inputs 
  Number of variables by role
  outcome:   1
  predictor: 5

  -- Training information 
  Training data contained 456 data points and no incomplete rows.

  -- Operations 
  * Centering and scaling for: carbon, hydrogen, oxygen, ... | Trained
  * ICA extraction with: carbon and hydrogen | Trained

bad args

Code
  rec %>% step_ica(carbon, hydrogen, prefix = 2) %>% prep()
Condition
  Error in `step_ica()`:
  Caused by error in `prep()`:
  ! `prefix` must be a single string, not the number 2.

tidymodels/recipes documentation built on Jan. 25, 2025, 7:30 a.m.