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Hands-On Data Analysis with Scala

You're reading from  Hands-On Data Analysis with Scala

Product type Book
Published in May 2019
Publisher Packt
ISBN-13 9781789346114
Pages 298 pages
Edition 1st Edition
Languages
Author (1):
Rajesh Gupta Rajesh Gupta
Profile icon Rajesh Gupta
Toc

Table of Contents (14) Chapters close

Preface 1. Section 1: Scala and Data Analysis Life Cycle
2. Scala Overview 3. Data Analysis Life Cycle 4. Data Ingestion 5. Data Exploration and Visualization 6. Applying Statistics and Hypothesis Testing 7. Section 2: Advanced Data Analysis and Machine Learning
8. Introduction to Spark for Distributed Data Analysis 9. Traditional Machine Learning for Data Analysis 10. Section 3: Real-Time Data Analysis and Scalability
11. Near Real-Time Data Analysis Using Streaming 12. Working with Data at Scale 13. Another Book You May Enjoy

Streaming a k-means clustering algorithm using Spark

The k-means algorithm is an unsupervised machine learning (ML) clustering algorithm. The objective of this algorithm is to build k centers around which data points are centered, thereby forming k clusters. The most common implementation of this algorithm is generally done using batch-oriented processing. Streaming-based clustering algorithms are also available for this, with the following properties:

  • The k clusters are built using initial data
  • As new data arrives in minibatches, existing k clusters are updated to compute new k clusters
  • It also possible to control the decay or decrease in the significance of older data

At a high level, the preceding steps are quite similar to the word count problem that we solved using the streaming solution. The goal of the k-means algorithm is to partition the data into k clusters. If the...

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