Scoring levels of categorical variables with heterogeneous data

@article{Tuv2004ScoringLO,
  title={Scoring levels of categorical variables with heterogeneous data},
  author={Eugene Tuv and George C. Runger},
  journal={IEEE Intelligent Systems},
  year={2004},
  volume={19},
  pages={14-19}
}
Heterogeneous (mixed-type) data present significant challenges in both supervised and unsupervised learning. The situation is even more complicated when nominal variables have several levels (values) that make using indicator variables (for every categorical level) infeasible. With unsupervised learning, several fairly involved, computationally intensive, nonlinear multivariate techniques iteratively alternate data transformations with optimal scoring. These seek to optimize an objective on the… CONTINUE READING

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