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      Chapter

      Handling Missing Data
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      Chapter

      Handling Missing Data

      DOI link for Handling Missing Data

      Handling Missing Data book

      Handling Missing Data

      DOI link for Handling Missing Data

      Handling Missing Data book

      ByMax Kuhn, Kjell Johnson
      BookFeature Engineering and Selection

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      Edition 1st Edition
      First Published 2019
      Imprint Chapman and Hall/CRC
      Pages 18
      eBook ISBN 9781315108230
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      ABSTRACT

      This chapter focuses on methods for resolving missing values within the predictors. The goal of feature engineering is to get the predictors into a form which models can better utilize in relating the predictors to the response. Missing values in the original predictors, regardless of any feature engineering, are intolerable in many kinds of predictive models. One framework to view missing values is through the lens of the mechanisms of missing data. Three common mechanisms are: structural deficiencies in the data, random occurrences, or specific causes. A co-occurrence plot can further deepen the understanding of missing information. This type of plot displays the frequency of missing predictor combinations. Simple numerical summaries are effective at identifying problematic predictors and samples when the data become too large to visually inspect. Many popular predictive models such as support vector machines, the glmnet, and neural networks, cannot tolerate any amount of missing values.

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