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Refactor inner functions #303

Merged
merged 3 commits into from
Aug 7, 2024
Merged

Refactor inner functions #303

merged 3 commits into from
Aug 7, 2024

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zachmayer
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  • Use function for model_type == "Classification"
  • Use subset to best preds function:
    • After training with caretTrain
    • For subsetting preds in caretStack
    • For subsetting preds in the autoplot
  • Move residuals function to autoplot file (caretStack), as thats the only place its used
  • Always add save probability and savePredictions to train control in caretList, as we need these for stacking
  • aggregate all numerics in extractbest preds, which removes an error condition

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coderabbitai bot commented Aug 7, 2024

Walkthrough

The recent changes predominantly enhance the clarity, efficiency, and functionality of the caret package's prediction and model validation processes. Key modifications include the introduction of new helper functions, streamlined logic for determining metrics, and improved handling of predictions and residuals. These updates simplify the internal structure and bolster the robustness of the testing framework, ultimately improving user experience without altering core functionalities.

Changes

Files Change Summary
R/caretList.R Streamlined logic for setting metric; ensured class probabilities are saved when is_class is true.
R/caretPredict.R Replaced extractModelType with isClassifierAndValidate; streamlined predictions handling; new helper functions added.
R/caretStack.R Replaced direct model type checks with isClassifier; introduced stackedTrainResiduals for residual extraction.
R/permutationImportance.R Removed isClassifier function, simplifying the module focusing on error calculations.
man/*.Rd Added documentation for new and modified functions (aggregate_mean_or_first, extractBestPreds, stackedTrainResiduals); marked several functions as internal.
tests/testthat/*.R Updated tests to reflect changes in model validation functions; emphasized correctness of predictions without invalid model type checks.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant caretPredict
    participant ModelValidation

    User->>caretPredict: Request predictions
    caretPredict->>ModelValidation: Validate model type
    ModelValidation-->>caretPredict: Return validation result
    caretPredict->>User: Return predictions
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Actionable comments posted: 1

Review details

Configuration used: .coderabbit.yaml
Review profile: CHILL

Commits

Files that changed from the base of the PR and between bc8d5de and 494900d.

Files selected for processing (15)
  • R/caretList.R (2 hunks)
  • R/caretPredict.R (8 hunks)
  • R/caretStack.R (5 hunks)
  • R/permutationImportance.R (1 hunks)
  • man/aggregate_mean_or_first.Rd (1 hunks)
  • man/caretPredict.Rd (1 hunks)
  • man/extractBestPreds.Rd (1 hunks)
  • man/extractModelName.Rd (1 hunks)
  • man/isClassifier.Rd (1 hunks)
  • man/isClassifierAndValidate.Rd (1 hunks)
  • man/set_excluded_class_id.Rd (1 hunks)
  • man/stackedTrainResiduals.Rd (1 hunks)
  • tests/testthat/test-caretEnsemble.R (1 hunks)
  • tests/testthat/test-caretList.R (1 hunks)
  • tests/testthat/test-helper_functions.R (7 hunks)
Files skipped from review due to trivial changes (8)
  • R/permutationImportance.R
  • man/aggregate_mean_or_first.Rd
  • man/caretPredict.Rd
  • man/extractBestPreds.Rd
  • man/extractModelName.Rd
  • man/isClassifier.Rd
  • man/stackedTrainResiduals.Rd
  • tests/testthat/test-caretList.R
Additional comments not posted (17)
man/set_excluded_class_id.Rd (1)

7-12: Ensure consistency in parameter description.

The parameter is_class is now described as a logical vector. Ensure that this change is consistently reflected in all related documentation and usage examples.

Verification successful

Documentation is consistent with code changes.

The parameter is_class is correctly documented as a logical vector in man/set_excluded_class_id.Rd, matching its usage in the code. No further inconsistencies were found.

Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify that the parameter `is_class` is consistently used and documented across the codebase.

# Test: Search for usage of `set_excluded_class_id`. Expect: Consistent use of `is_class`.
rg --type r 'set_excluded_class_id'

Length of output: 171


Script:

#!/bin/bash
# Search for the parameter `is_class` in `.Rd` files to ensure consistent documentation.
rg --type rd 'is_class'

Length of output: 50


Script:

#!/bin/bash
# Search for the parameter `is_class` in documentation files to ensure consistent documentation.
rg 'is_class' man/

Length of output: 182

man/isClassifierAndValidate.Rd (1)

3-18: Update documentation to reflect function's new purpose.

The function isClassifierAndValidate now returns a logical value, indicating whether a model is a classifier. Ensure the description emphasizes this validation aspect and that all references to the function have been updated.

Verification successful

Documentation is consistent with function usage.

The isClassifierAndValidate function is consistently used across the codebase, and its documentation correctly reflects its purpose of validating model types by returning a logical value. No further updates are necessary.

Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify that the function `isClassifierAndValidate` is consistently used and documented across the codebase.

# Test: Search for usage of `isClassifierAndValidate`. Expect: Consistent use and updated references.
rg --type r 'isClassifierAndValidate'

Length of output: 3562

tests/testthat/test-caretEnsemble.R (1)

248-250: Verify the updated function usage in the test case.

The test now uses stackedTrainResiduals to handle missing predictions. Ensure that this function is correctly implemented and that its usage aligns with the test's purpose.

Verification successful

The function stackedTrainResiduals is correctly implemented and used in the test case. The test case appropriately checks for scenarios with missing predictions, aligning with the function's logic. The message about setting savePredictions = 'final' is relevant and accurate.

  • The function handles both regression and classification tasks by calculating residuals.
  • The test case correctly uses this function to verify behavior when predictions are not saved.
Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify the implementation and usage of `stackedTrainResiduals` in the codebase.

# Test: Search for the function definition and usage of `stackedTrainResiduals`. Expect: Correct implementation and usage.
rg --type r 'stackedTrainResiduals'

Length of output: 405


Script:

#!/bin/bash
# Description: Examine the implementation of `stackedTrainResiduals` to verify its correctness.

# Extract the implementation of `stackedTrainResiduals`.
rg --type r -A 20 'stackedTrainResiduals <- function' R/caretStack.R

Length of output: 618

R/caretPredict.R (6)

93-95: Efficient use of extractBestPreds.

The update to save only the best predictions using extractBestPreds is efficient and improves the code.


126-137: Correct aggregation logic.

The aggregate_mean_or_first function correctly handles numeric and character data aggregation.


139-172: Well-structured prediction extraction.

The extractBestPreds function is well-structured and efficiently handles the extraction and averaging of predictions.


344-357: Accurate classifier identification.

The isClassifier function accurately identifies classifier models.


359-391: Comprehensive validation checks.

The isClassifierAndValidate function includes comprehensive validation checks, enhancing robustness.


Line range hint 12-45:
LGTM! But verify the function usage in the codebase.

The refactoring of caretPredict enhances readability and maintainability by using helper functions. The changes are approved.

However, ensure that all function calls to caretPredict handle the new logic correctly.

Verification successful

Function usage verified and correct

The function caretPredict is used in various parts of the codebase, including tests that validate its behavior. The integration appears correct and consistent with the refactoring.

  • tests/testthat/test-helper_functions.R: Tests for extracting best predictions.
  • R/caretStack.R: Used for meta predictions.
  • R/caretList.R: Applied to a list of models.
Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify the usage of `caretPredict` in the codebase.

# Test: Search for the function usage. Expect: Proper handling of new logic.
rg --type r -A 5 $'caretPredict'

Length of output: 2133

R/caretList.R (1)

Line range hint 77-97:
Improved readability and data retention.

The refactoring of caretList enhances readability and ensures class probabilities are saved, which is crucial for classification tasks.

tests/testthat/test-helper_functions.R (5)

Line range hint 26-50:
Thorough testing of validation logic.

The test updates ensure that the new isClassifierAndValidate function is thoroughly tested for logical outputs.


177-181: Correct handling of missing probability functions.

The test correctly ensures that isClassifierAndValidate stops when a model can't predict probabilities.


184-188: Correct handling of missing saved probabilities.

The test ensures that isClassifierAndValidate stops when class probabilities are not saved, which is crucial for classification.


170-174: Comprehensive validation of excluded class levels.

The test ensures that validateExcludedClass handles various input scenarios correctly, covering edge cases.


457-463: Correct handling of missing savePredictions.

The test ensures that isClassifierAndValidate fails when savePredictions is not set, which is essential for stacked predictions.

R/caretStack.R (2)

146-149: LGTM! Improved clarity with isClassifier.

The replacement of direct model type checks with isClassifier(object) enhances readability and maintainability.


226-231: LGTM! Simplified parameter usage.

The function now uses a boolean is_class to determine if the model is a classifier, which simplifies the logic.

R/caretStack.R Show resolved Hide resolved
@zachmayer zachmayer merged commit d3af788 into main Aug 7, 2024
12 checks passed
@zachmayer zachmayer deleted the use-funs branch August 7, 2024 19:36
@zachmayer zachmayer mentioned this pull request Aug 9, 2024
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