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  • 02_Techniques_for_Dimensionality_Reduction
  • 02_Techniques_for_Dimensionality_Reduction
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Techniques for Dimensionality Reduction

ETL Big data Data preprocessing Performance Accuracy
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This workflow performs classification on data sets that were reduced using the following dimensionality reduction techniques: - Linear Discriminant Analysis (LDA) - Auto-encoder - t-SNE - Missing values ratio - Low variance filter - High correlation filter - Ensemble tree - PCA - Backward feature elimination - Forward feature selection --- The performances of the classification models are compared to the performance that is achieved when all columns are retained in terms of overall accuracy and AuC statistics. These evaluation metrics are produced by the best performing classification model out of this bag of models: - Multilayer Feedforward Neural Networks - Naive Bayes - Decision Tree

External resources

  • Principal component analysis
  • Neural networks [6.1] : Autoencoder - definition
  • Linear discriminant analysis
  • Paper Dissected: "Visualizing Data Using t-SNE" Explained
  • Random Forest for Data Dimensionality Reduction
  • Seven Techniques for Data Dimensionality Reduction
  • KDD Cup 2009 Data

Used extensions & nodes

Created with KNIME Analytics Platform version 4.1.0
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    KNIME Core Trusted extension

    KNIME AG, Zurich, Switzerland

    Version 4.1.0

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    KNIME Data Generation Trusted extension

    KNIME AG, Zurich, Switzerland

    Version 4.1.0

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    KNIME Deep Learning - Keras Integration Trusted extension

    KNIME AG, Zurich, Switzerland

    Version 4.1.0

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    KNIME Ensemble Learning Wrappers Trusted extension

    KNIME AG, Zurich, Switzerland

    Version 4.1.0

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    KNIME JavaScript Views Trusted extension

    KNIME AG, Zurich, Switzerland

    Version 4.1.0

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    KNIME Math Expression (JEP) Trusted extension

    KNIME AG, Zurich, Switzerland

    Version 4.1.0

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    KNIME Optimization extension Trusted extension

    KNIME AG, Zurich, Switzerland

    Version 4.1.0

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    KNIME Quick Forms Trusted extension

    KNIME AG, Zurich, Switzerland

    Version 4.1.0

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    KNIME Statistics Nodes (Labs) Trusted extension

    KNIME AG, Zurich, Switzerland

    Version 4.1.0

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