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- W2065900908 abstract "Outliers identification algorithms for categorical datasets strongly depend on parameter settings that require prior information about the data, e.g. number of outliers in the data, maximum length of itemsets and/or minimum support for frequent itemsets. These input parameters are classified into two groups; (a) intrinsic parameters which are required by an outliers detection method to produce a score measure to each object and (b) decision parameters which are required for deciding on whether an object is an outlier based on the score. In this paper, a general approach for automating decision parameters of outliers identification in multivariate categorical data is proposed. The added value of the proposed approach is that it can be used by any outliers detection algorithm for categorical data that produces a score measure for each object. We provide a simulation approach for computing critical values for any outliers detection algorithm. These critical values are distribution-free statistical measures. They are also based on data-driven characteristics, hence they can be used for the identification of outliers based on the score measure produced by the algorithm. We illustrate this approach using two outliers detection algorithms. Furthermore, real and synthetic datasets are used to evaluate the performance of the proposed approach." @default.
- W2065900908 created "2016-06-24" @default.
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- W2065900908 date "2013-05-01" @default.
- W2065900908 modified "2023-09-25" @default.
- W2065900908 title "A general approach for automating outliers identification in categorical data" @default.
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- W2065900908 doi "https://doi.org/10.1109/aiccsa.2013.6616425" @default.
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