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Network Science with Python and NetworkX Quick Start Guide

You're reading from   Network Science with Python and NetworkX Quick Start Guide Explore and visualize network data effectively

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Product type Paperback
Published in Apr 2019
Publisher Packt
ISBN-13 9781789955316
Length 190 pages
Edition 1st Edition
Languages
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Author (1):
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Edward L. Platt Edward L. Platt
Author Profile Icon Edward L. Platt
Edward L. Platt
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Table of Contents (15) Chapters Close

Preface 1. What is a Network? FREE CHAPTER 2. Working with Networks in NetworkX 3. From Data to Networks 4. Affiliation Networks 5. The Small Scale - Nodes and Centrality 6. The Big Picture - Describing Networks 7. In-Between - Communities 8. Social Networks and Going Viral 9. Simulation and Analysis 10. Networks in Space and Time 11. Visualization 12. Conclusion 13. Other Books You May Enjoy Appendix

Closeness centrality

The measure known as closeness centrality is one of the oldest centrality measures used in network science, proposed by the sociologist, Alex Bavelas, in 1950. Closeness is defined as the reciprocal of farness. What is farness? It's the reciprocal of closeness, of course! More helpfully, the farness of a node is the sum of distances between that node and all other nodes. So, a node with high closeness centrality is literally close to other nodes. Nodes with high closeness have, on average, short paths to many other nodes, which can be helpful for disseminating resources quickly.

The following example uses the NetworkX closeness_centrality() function to calculate the closeness centrality values for the suffragette network and display the top 10:

closeness = nx.closeness_centrality(G)
sorted(closeness.items(), key=lambda x:x[1], reverse=True)[0:10]

[(&apos...
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