Robust hybrid algorithms for regularization and variable selection in QSAR studies

Authors

  • Christian N. Nwaeme
    African Institute for Mathematical Sciences, Mbour-Thies and BP. 1418, Senegal
  • Adewale F. Lukman
    University of Medical Sciences, Ondo State, PMB 536, Nigeria. | University of North Dakota, Grand Forks, ND, USA

Keywords:

High dimension, QSAR, Multicollinearity, Outliers, Sparse Least trimmed squares, Random forest

Abstract

This study introduces a robust hybrid sparse learning approach for regularization and variable selection. This approach comprises two distinct steps. In the initial step, we segment the original dataset into separate training and test sets and standardize the training data using its mean and standard deviation. We then employ either the LASSO or sparse LTS algorithm to analyze the training set, facilitating the selection of variables with non-zero coefficients as essential features for the new dataset. Secondly, the new dataset is divided into training and test sets. The training set is further divided into k folds and evaluated using a combination of Random Forest, Ridge, Lasso, and Support Vector Regression machine learning algorithms. We introduce novel hybrid methods and juxtapose their performance against existing techniques. To validate the efficacy of our proposed methods, we conduct a comprehensive simulation study and apply them to a real-life QSAR analysis. The findings unequivocally demonstrate the superior performance of our proposed estimator, with particular distinction accorded to SLTS+LASSO. In summary, the twostep robust hybrid sparse learning approach offers an effective regularization and variable selection applicable to a wide spectrum of real-world problems.

Dimensions

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Published

2023-11-28

How to Cite

Robust hybrid algorithms for regularization and variable selection in QSAR studies. (2023). Journal of the Nigerian Society of Physical Sciences, 5(4), 1708. https://doi.org/10.46481/jnsps.2023.1708

Issue

Volume 5, Issue 4, November 2023

Section

Original Research
Copyright & Licensing

Copyright (c) 2023 Adewale F. Lukman, Christian N. Nwaeme

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Robust hybrid algorithms for regularization and variable selection in QSAR studies. (2023). Journal of the Nigerian Society of Physical Sciences, 5(4), 1708. https://doi.org/10.46481/jnsps.2023.1708

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