Machine Learning Based Missing Values Imputation in Categorical Datasets
This work addresses the problem of handling missing values in categorical data for data scientists and analysts, but it is incremental as it builds on existing ensemble methods without introducing a fundamentally new approach.
The study tackled missing data imputation in categorical datasets using ensemble machine learning models, finding that ensemble models based on the Error Correction Output Codes framework significantly improved prediction accuracy and robustness compared to solo models, with performance varying by dataset and missing pattern.
In order to predict and fill in the gaps in categorical datasets, this research looked into the use of machine learning algorithms. The emphasis was on ensemble models constructed using the Error Correction Output Codes framework, including models based on SVM and KNN as well as a hybrid classifier that combines models based on SVM, KNN,and MLP. Three diverse datasets, the CPU, Hypothyroid, and Breast Cancer datasets were employed to validate these algorithms. Results indicated that these machine learning techniques provided substantial performance in predicting and completing missing data, with the effectiveness varying based on the specific dataset and missing data pattern. Compared to solo models, ensemble models that made use of the ECOC framework significantly improved prediction accuracy and robustness. Deep learning for missing data imputation has obstacles despite these encouraging results, including the requirement for large amounts of labeled data and the possibility of overfitting. Subsequent research endeavors ought to evaluate the feasibility and efficacy of deep learning algorithms in the context of the imputation of missing data.