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Add RobustScaler #650

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lars-reimann opened this issue Apr 24, 2024 · 1 comment · Fixed by #874
Closed

Add RobustScaler #650

lars-reimann opened this issue Apr 24, 2024 · 1 comment · Fixed by #874
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@Tarmandan @wastedareas
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enhancement 💡 New feature or request lab Suitable for the lab released Included in a release team1

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@lars-reimann
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lars-reimann commented Apr 24, 2024 •
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Is your feature request related to a problem?

The two scalers, range scaler and standard scaler, cannot deal with outliers well.

Desired solution

Add a new class RobustScaler similar to the scikit-learn transformer with the same name. It should be implemented using polars directly to avoid unnecessary conversions.

  • Superclass: InvertibleTableTransformer
  • Constructor parameters:
    • column_names: str | list[str] | None = None (keyword-only). List of columns to transform, if None all numeric columns passed in fit.
  • Attributes:
    • self._data_median: pl.DataFrame | None = None
    • self._data_scale: pl.DataFrame | None = None
  • fit:
    • Call _check_columns_exist to ensure columns to transform exist
    • Call _check_columns_are_numeric to ensure that columns to transform are numeric
    • Raise value error if row_count is 0
    • Create a new instance of the RobustScaler, don't mutate it in place
    • Compute the median (second quartile) for each column to transform and store it in _data_median of the copied transformer
    • Compute the first and third quartile for each column to transform and store the difference (third - first) in _data_scale of the copied transformer
  • transform:
    • TransformerNotFittedError if transformer is not fitted
    • Call _check_columns_exist to ensure columns to transform exist
    • Call _check_columns_are_numeric to ensure that columns to transform are numeric
    1. Subtract _data_median for each column to transform
    2. Divide result by _data_scale for each column to transform
  • inverse_transform:
    • TransformerNotFittedError if transformer is not fitted
    • Call _check_columns_exist to ensure columns to transform exist
    • Call _check_columns_are_numeric to ensure that columns to transform are numeric
    1. Multiply by _data_scale for each column to transform
    2. Add _data_median for each column to transform

See implementation of RangeScaler and StandardScaler for implementation of similar functionality.

Possible alternatives (optional)

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Additional Context (optional)

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@lars-reimann lars-reimann added the enhancement 💡 New feature or request label Apr 24, 2024
@lars-reimann lars-reimann changed the title Add RobustScaler from scikit-learn Add RobustScaler May 28, 2024
@lars-reimann lars-reimann added the lab Suitable for the lab label May 28, 2024
@lars-reimann lars-reimann added team1 and removed team1 labels Jun 17, 2024
@Tarmandan Tarmandan mentioned this issue Jun 28, 2024
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@Tarmandan Tarmandan linked a pull request Jun 28, 2024 that will close this issue
feat: add robustscaler #874
Merged
lars-reimann pushed a commit that referenced this issue Jul 19, 2024
@semantic-release-bot
chore(release): 0.27.0 [skip ci]
9ba23a4 
## [0.27.0](v0.26.0...v0.27.0) (2024-07-19)

### Features

*  join ([#870](#870)) ([5764441](5764441)), closes [#745](#745)
* activation function for forward layer ([#891](#891)) ([5b5bb3f](5b5bb3f)), closes [#889](#889)
* add `ImageDataset.split` ([#846](#846)) ([3878751](3878751)), closes [#831](#831)
* add FunctionalTableTransformer ([#901](#901)) ([37905be](37905be)), closes [#858](#858)
* add InvalidFitDataError ([#824](#824)) ([487854c](487854c)), closes [#655](#655)
* add KNearestNeighborsImputer ([#864](#864)) ([fcdfecf](fcdfecf)), closes [#743](#743)
* add moving average plot ([#836](#836)) ([abcf68a](abcf68a))
* add RobustScaler ([#874](#874)) ([62320a3](62320a3)), closes [#650](#650) [#873](#873)
* add SequentialTableTransformer ([#893](#893)) ([e93299f](e93299f)), closes [#802](#802)
* add temporal operations ([#832](#832)) ([06eab77](06eab77))
* added 'histogram_2d' in TablePlotter  ([#903](#903)) ([4e65ba9](4e65ba9)), closes [#869](#869) [#798](#798)
* added from_str_to_temporal and continues prediction ([#767](#767)) ([35f468a](35f468a)), closes [#806](#806) [#765](#765) [#740](#740) [#773](#773)
* added GRU layer ([#845](#845)) ([d33cb5d](d33cb5d))
* Adds Dropout Layer ([#868](#868)) ([a76f0a1](a76f0a1)), closes [#848](#848)
* dark mode for plots ([#911](#911)) ([5447551](5447551)), closes [#798](#798)
* easily create a baseline model ([#811](#811)) ([8e1b995](8e1b995)), closes [#710](#710)
* get first cell with value other than `None` ([#904](#904)) ([5a0cdb3](5a0cdb3)), closes [#799](#799)
* hyperparameter optimization for fnn models ([#897](#897)) ([c1f66e5](c1f66e5)), closes [#861](#861)
* implement violin plots ([#900](#900)) ([9f5992a](9f5992a)), closes [#867](#867)
* plot decision tree ([#876](#876)) ([d3f81dc](d3f81dc)), closes [#856](#856)
* prediction no longer takes a time series dataset only table ([#838](#838)) ([762e5c2](762e5c2)), closes [#837](#837)
* raise if `remove_colums` is called with unknown column by default ([#852](#852)) ([8f78163](8f78163)), closes [#807](#807)
* regularization strength for logistic classifier ([#866](#866)) ([9f74e92](9f74e92)), closes [#750](#750)
* reorders parameters of RangeScaler and makes them keyword-only ([#847](#847)) ([2b82db7](2b82db7)), closes [#809](#809)
* replace seaborn with matplotlib for box_plot ([#863](#863)) ([4ef078e](4ef078e)), closes [#805](#805) [#849](#849)
* replaced seaborn with matplotlib for correlation_heatmap ([#850](#850)) ([d4680d4](d4680d4)), closes [#800](#800) [#849](#849)

### Bug Fixes

* **deps:** bump urllib3 from 2.2.1 to 2.2.2 ([#842](#842)) ([b81bcd6](b81bcd6)), closes [#3122](https://github.com/Safe-DS/Library/issues/3122) [#3363](https://github.com/Safe-DS/Library/issues/3363) [#3122](https://github.com/Safe-DS/Library/issues/3122) [#3363](https://github.com/Safe-DS/Library/issues/3363) [#3406](https://github.com/Safe-DS/Library/issues/3406) [#3398](https://github.com/Safe-DS/Library/issues/3398) [#3399](https://github.com/Safe-DS/Library/issues/3399) [#3396](https://github.com/Safe-DS/Library/issues/3396) [#3394](https://github.com/Safe-DS/Library/issues/3394) [#3391](https://github.com/Safe-DS/Library/issues/3391) [#3316](https://github.com/Safe-DS/Library/issues/3316) [#3387](https://github.com/Safe-DS/Library/issues/3387) [#3386](https://github.com/Safe-DS/Library/issues/3386)
* labels of correlation heatmap ([#894](#894)) ([a88a609](a88a609)), closes [#871](#871)
* make multi-processing in baseline models more consistent ([#909](#909)) ([fa24560](fa24560)), closes [#907](#907)

### Performance Improvements

* improved performance in various methods in `Image` and `ImageList` ([#879](#879)) ([134e7d8](134e7d8))
@lars-reimann
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🎉 This issue has been resolved in version 0.27.0 🎉

The release is available on:

Your semantic-release bot 📦🚀

@lars-reimann lars-reimann added the released Included in a release label Jul 19, 2024
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@wastedareas wastedareas

Labels
enhancement 💡 New feature or request lab Suitable for the lab released Included in a release team1
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Library
Status: ✔️ Done
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feat: add robustscaler Safe-DS/Library
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@lars-reimann @Tarmandan @wastedareas