A Python implementation of Synthetic Minority Over-Sampling Technique for Regression with Gaussian Noise (SMOGN). Conducts the Synthetic Minority Over-Sampling Technique for Regression (SMOTER) with traditional interpolation, as well as with the introduction of Gaussian Noise (SMOTER-GN). Selects between the two over-sampling techniques by the KNN distances underlying a given observation. If the distance is close enough, SMOTER is applied. If too far away, SMOTER-GN is applied. Useful for prediction problems where regression is applicable, but the values in the interest of predicting are rare or uncommon. This can also serve as a useful alternative to log transforming a skewed response variable, especially if generating synthetic data is also of interest.
The only open-source Python supported version of Synthetic Minority Over-Sampling Technique for Regression.
Supports Pandas DataFrame inputs containing mixed data types, auto distance metric selection by data type, and optional auto removal of missing values.
Flexible inputs available to control the areas of interest within a continuous response variable and friendly parameters for over-sampling synthetic data.
Purely Pythonic, developed for consistency, maintainability, and future improvement, no foreign function calls to C or Fortran, as contained in original R implementation.
## install pypi release pip install smogn ## install developer version pip install git+https://github.com/nickkunz/smogn.git
## load libraries import smogn import pandas ## load data housing = pandas.read_csv( ## http://jse.amstat.org/v19n3/decock.pdf "https://raw.githubusercontent.com/nickkunz/smogn/master/data/housing.csv" ) ## conduct smogn housing_smogn = smogn.smoter( data = housing, y = "SalePrice" )
© Nick Kunz, 2019. Licensed under the General Public License v3.0 (GPLv3).
SMOGN is open for improvements and maintenance. Your help is valued to make the package better for everyone.
Branco, P., Torgo, L., Ribeiro, R. (2017). SMOGN: A Pre-Processing Approach for Imbalanced Regression. Proceedings of Machine Learning Research, 74:36-50. http://proceedings.mlr.press/v74/branco17a/branco17a.pdf.