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- W2402081075 abstract "We study a classification problem of significant differences in the proportion of two groups known as the unbalanced classification problem. It is usually more difficult to classify classes accurately in unbalanced data than balanced data. Most observations are likely to be classified to the bigger group if we apply classification methods to the unbalanced data because it can minimize the misclassification loss. However, this smaller group is misclassified as the larger group problem that can cause a bigger loss in most real applications. We compare several classification methods for the unbalanced data using sampling techniques (up and down sampling). We also check the total loss of different classification methods when the asymmetric loss is applied to simulated and real data. We use the misclassification rate, G-mean, ROC and AUC (area under the curve) for the performance comparison." @default.
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- W2402081075 date "2015-06-30" @default.
- W2402081075 modified "2023-09-26" @default.
- W2402081075 title "Classification Analysis for Unbalanced Data" @default.
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- W2402081075 doi "https://doi.org/10.5351/kjas.2015.28.3.495" @default.
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