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政大典藏 > College of Commerce > Department of Statistics > Periodical Articles > Item 140.119/152336

Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/152336

Title:	Missing data imputation using classification and regression trees
Authors:	張育瑋 Chang, Yu-Wei;Chen, Cheng-Yang
Contributors:	統計系
Keywords:	Classification and regression trees;Missing data;Missing data imputation;Resampling
Date:	2024-06
Issue Date:	2024-07-17
Abstract:	Background Missing data are common when analyzing real data. One popular solution is to impute missing data so that one complete dataset can be obtained for subsequent data analysis. In the present study, we focus on missing data imputation using classification and regression trees (CART). Methods We consider a new perspective on missing data in a CART imputation problem and realize the perspective through some resampling algorithms. Several existing missing data imputation methods using CART are compared through simulation studies, and we aim to investigate the methods with better imputation accuracy under various conditions. Some systematic findings are demonstrated and presented. These imputation methods are further applied to two real datasets: Hepatitis data and Credit approval data for illustration. Results The method that performs the best strongly depends on the correlation between variables. For imputing missing ordinal categorical variables, the rpart package with surrogate variables is recommended under correlations larger than 0 with missing completely at random (MCAR) and missing at random (MAR) conditions. Under missing not at random (MNAR), chi-squared test methods and the rpart package with surrogate variables are suggested. For imputing missing quantitative variables, the iterative imputation method is most recommended under moderate correlation conditions.
Relation:	PeerJ Computer Science, 10, e2119
Data Type:	article
DOI link:	https://doi.org/10.7717/peerj-cs.2119
DOI:	10.7717/peerj-cs.2119
Appears in Collections:	[Department of Statistics] Periodical Articles

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