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Mastering Hadoop 3

You're reading from  Mastering Hadoop 3

Product type Book
Published in Feb 2019
Publisher Packt
ISBN-13 9781788620444
Pages 544 pages
Edition 1st Edition
Languages
Authors (2):
Chanchal Singh Chanchal Singh
Profile icon Chanchal Singh
Manish Kumar Manish Kumar
Profile icon Manish Kumar
View More author details
Toc

Table of Contents (23) Chapters close

Title Page
Dedication
About Packt
Foreword
Contributors
Preface
1. Journey to Hadoop 3 2. Deep Dive into the Hadoop Distributed File System 3. YARN Resource Management in Hadoop 4. Internals of MapReduce 5. SQL on Hadoop 6. Real-Time Processing Engines 7. Widely Used Hadoop Ecosystem Components 8. Designing Applications in Hadoop 9. Real-Time Stream Processing in Hadoop 10. Machine Learning in Hadoop 11. Hadoop in the Cloud 12. Hadoop Cluster Profiling 13. Who Can Do What in Hadoop 14. Network and Data Security 15. Monitoring Hadoop 1. Other Books You May Enjoy Index

Common machine learning challenges


The following are some of the common challenges that you will face while running your machine learning application:

  • Data quality: Data from sources is, most of the time, not suitable for machine learning. It has to be cleaned or checked for data quality first. Data has to be in the format that is suitable for the machine learning processes that you want to run. One such example would be removing nulls. The popular machine learning algorithm Random Forest does not support nulls.
  • Data scaling: Sometimes, your data is comprised of attributes that vary in magnitude or scale. So, to prevent machine learning algorithms from being unbiased to re-scaling, under-scaled or over-scaled, attributes of the same scale is helpful. This helps machine learning optimization algorithms like gradient descent a great deal. Algorithms that iteratively weigh inputs, like regression and neural networks, or algorithms that are based on distance measures, like k-nearest neighbors...
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