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ARTICLE

EGAIN: Enhanced Generative Adversarial Networks for Imputing Missing Values

Abolfazl Saghafi1,*, Soodeh Moallemian2, Miray Budak2, Rutvik Deshpande2
1 Department of Mathematics, Saint Joseph’s University, Philadelphia, PA, USA
2 Center for Molecular & Behavioral Neuroscience, Rutgers University–Newark, Newark, NJ, USA
* Corresponding Author: Abolfazl Saghafi. Email: email

Computers, Materials & Continua https://doi.org/10.32604/cmc.2026.082996

Received 26 March 2026; Accepted 13 May 2026; Published online 03 June 2026

Abstract

Missing data remain a persistent challenge in statistical analysis and machine learning because many predictive methods require complete observations. Generative Adversarial Imputation Networks (GAIN) offer a flexible deep-learning approach for missing value imputation, but their practical use is limited by convergence instability, sensitivity to hyperparameter selection, and dependence on outdated software implementations. To address these limitations, we propose Enhanced Generative Adversarial Imputation Networks (EGAIN), a modernized extension of GAIN implemented in TensorFlow 2.x. EGAIN incorporates convolution-based generator and discriminator networks, a channel-stacked representation of the data and mask, and checkpoint-based training diagnostics to improve stability and usability. EGAIN was evaluated on five benchmark datasets under multiple Missing Completely At Random (MCAR) settings and compared with the original GAIN implementation and median imputation. Across most evaluated conditions, EGAIN achieved lower root mean squared error (RMSE) and showed greater robustness, particularly when missingness was concentrated in a subset of variables. These results indicate that EGAIN provides a more stable and reproducible framework for missing data imputation in tabular datasets.

Keywords

Missing value imputation; generative adversarial network; tabular data imputation; missing completely at random; convolutional architectures; training stability

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