Data preprocessing issues for incomplete medical datasets

Min Wei Huang, Wei Chao Lin, Chih Wen Chen, Shih Wen Ke, Chih Fong Tsai, William Eberle

研究成果: 雜誌貢獻期刊論文同行評審

24 引文 斯高帕斯(Scopus)


While there is an ample amount of medical information available for data mining, many of the datasets are unfortunately incomplete – missing relevant values needed by many machine learning algorithms. Several approaches have been proposed for the imputation of missing values, using various reasoning steps to provide estimations from the observed data. One of the important steps in data mining is data preprocessing, where unrepresentative data is filtered out of the data to be mined. However, none of the related studies about missing value imputation consider performing a data preprocessing step before imputation. Therefore, the aim of this study is to examine the effect of two preprocessing steps, feature and instance selection, on missing value imputation. Specifically, eight different medical-related datasets are used, containing categorical, numerical and mixed types of data. Our experimental results show that imputation after instance selection can produce better classification performance than imputation alone. In addition, we will demonstrate that imputation after feature selection does not have a positive impact on the imputation result.

頁(從 - 到)432-438
期刊Expert Systems
出版狀態已出版 - 1 10月 2016


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