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Hands-On Data Analysis with Scala

You're reading from   Hands-On Data Analysis with Scala Perform data collection, processing, manipulation, and visualization with Scala

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

Table of Contents (14) Chapters Close

Preface 1. Section 1: Scala and Data Analysis Life Cycle FREE CHAPTER
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

k-means cluster analysis

k-means is a clustering ML algorithm. This is a nonsupervised ML algorithm. Its primary use is for clustering together closely related data and gaining an understanding of the structural properties of the data.

As the name suggests, this algorithm tries to form a k number of clusters around k-mean values. How many clusters are to be formed, that is, the value of k, is something a human being has to determine at the outset. This algorithm relies on the Euclidean distance to calculate the distance between two points. We can think of each observation as a point in n-dimensional space, where n is the number of features. The distance between two observations is the Euclidean distance between these in n-dimensional space.

To begin with, the algorithm picks up k random records from the dataset. These are the initial k-mean values. In the next step, for each record...

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