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agg-vs-imp's Introduction

Aggregation vs imputation

Configuration

Datasets

See: UCI Machine Learning datasets for R

  • D1 - bank-marketing
  • D2 - census-income
  • D3 - credit-card
  • D4 - magic
  • D5 - wine-quality

Classifiers

See: caret

  • K1 - glm
  • K2 - nnet
  • K3 - svmLinear
  • K4 - rpart
  • K5 - nnet

Imputation

  • I1 - median & mode
  • I2 - random forest (missForest)
  • I3 - chained equations (mice)

Agregation operators

Experiment procedure

For each Di:

  1. Divide Di into Di^1 and Di^2
  2. Learn classifiers Kj on Di^1 (10-CV)
  3. Du^2 := randomly obscured Di^2 with data loss from 0% to 50%
  4. Calculate accuracy, sensitivity, specificity and decisiveness for classifiers Kj on Di^2
  5. Choose the best impuation on Di^2
  6. Find aggregation operator:
    1. Calculate inteval predictions on Di^2
    2. Choose the best aggregation operator on inteval predictions
  7. Compare Kj with the best imputation and agregation operator

agg-vs-imp's People

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