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Machine Learning with R

Machine Learning with R - Fourth Edition

By : Brett Lantz
4.8 (21)
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Machine Learning with R

Machine Learning with R

4.8 (21)
By: Brett Lantz

Overview of this book

Dive into R with this data science guide on machine learning (ML). Machine Learning with R, Fourth Edition, takes you through classification methods like nearest neighbor and Naive Bayes and regression modeling, from simple linear to logistic. Dive into practical deep learning with neural networks and support vector machines and unearth valuable insights from complex data sets with market basket analysis. Learn how to unlock hidden patterns within your data using k-means clustering. With three new chapters on data, you’ll hone your skills in advanced data preparation, mastering feature engineering, and tackling challenging data scenarios. This book helps you conquer high-dimensionality, sparsity, and imbalanced data with confidence. Navigate the complexities of big data with ease, harnessing the power of parallel computing and leveraging GPU resources for faster insights. Elevate your understanding of model performance evaluation, moving beyond accuracy metrics. With a new chapter on building better learners, you’ll pick up techniques that top teams use to improve model performance with ensemble methods and innovative model stacking and blending techniques. Machine Learning with R, Fourth Edition, equips you with the tools and knowledge to tackle even the most formidable data challenges. Unlock the full potential of machine learning and become a true master of the craft.
Table of Contents (18 chapters)
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16
Other Books You May Enjoy
17
Index

Estimating future performance

Some R machine learning packages present confusion matrices and performance measures during the model-building process. The purpose of these statistics is to provide insight into the model’s resubstitution error, which occurs when the target values of training examples are incorrectly predicted, despite the model being trained on this data. This can be used as a rough diagnostic to identify obviously poor performers. A model that cannot perform sufficiently well on the data it was trained on is unlikely to do well on future data.

The opposite is not true. In other words, a model that performs well on the training data cannot be assumed to perform well on future datasets. For example, a model that used rote memorization to perfectly classify every training instance with zero resubstitution error would be unable to generalize its predictions to data it has never seen before. For this reason, the error rate on the training data can be assumed...

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Machine Learning with R
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