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The Data Science Workshop

You're reading from   The Data Science Workshop A New, Interactive Approach to Learning Data Science

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Product type Paperback
Published in Jan 2020
Publisher
ISBN-13 9781838981266
Length 818 pages
Edition 1st Edition
Languages
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Authors (5):
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Thomas Joseph Thomas Joseph
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Thomas Joseph
Andrew Worsley Andrew Worsley
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Andrew Worsley
Robert Thas John Robert Thas John
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Robert Thas John
Anthony So Anthony So
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Anthony So
Dr. Samuel Asare Dr. Samuel Asare
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Dr. Samuel Asare
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Toc

Table of Contents (18) Chapters Close

Preface 1. Introduction to Data Science in Python 2. Regression FREE CHAPTER 3. Binary Classification 4. Multiclass Classification with RandomForest 5. Performing Your First Cluster Analysis 6. How to Assess Performance 7. The Generalization of Machine Learning Models 8. Hyperparameter Tuning 9. Interpreting a Machine Learning Model 10. Analyzing a Dataset 11. Data Preparation 12. Feature Engineering 13. Imbalanced Datasets 14. Dimensionality Reduction 15. Ensemble Learning 16. Machine Learning Pipelines 17. Automated Feature Engineering

Data

In the world of machine learning, the data that you have is not used in its entirety to train your model. Instead, you need to separate your data into three sets, as mentioned here:

  • A training dataset, which is used to train your model and measure the training loss.
  • An evaluation or validation dataset, which you use to measure the validation loss of the model to see whether the validation loss continues to reduce as well as the training loss.
  • A test dataset for final testing to see how well the model performs before you put it into production.

The Ratio for Dataset Splits

The evaluation dataset is set aside from your entire training data and is never used for training. There are various schools of thought around the particular ratio that is set aside for evaluation, but it generally ranges from a high of 30% to a low of 10%. This evaluation dataset is normally further split into a validation dataset that is used during training and a test dataset that...

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