Introduction to NodeXL

Transcription

1 Introduction to NodeXL Wasim Ahmed An Introduction to Tools for Social Media Research 11 th October 2016, London.

2 2 About me PhD student in the Health Informatics Research Group, Information School, University of Sheffield. Research Associate (Social Media Specialist), Management School, University of Sheffield. Visibrain Blog Partner, Connected Action Partner, Echosec Advisor, SMRF Member, and NSMNSS member.

3 3 PhD Background PhD project examines infectious disease outbreaks on Twitter (Swine Flu and Ebola). PhD contains a chapter on tools, methods and software of capturing and analysing Twitter data. Regular contributor to the LSE Impact blog on social media

4 4 NodeXL Network Overview, Discovery, and Exploration for Excel (NodeXL) is a graph visualization tool. Allows the extraction of data from a number of popular social media platforms including Twitter, YouTube, and Facebook. Instagram capabilities in beta.

5 5 NodeXL Once data is captured NodeXL can process data to extract graph metrics Also enables the visualization of the extracted graphs based on a number of graph layout algorithms Intended for users with little or no programming experience to perform Social Network Analysis

6 6 Social Network Analysis Social Network Analysis (SNA) is the process of investigating social structures through the use of network and graph theories (Otte, Evelien, Rousseau, and Ronald, 2002) Key terminology: Node = actor on which relationships act Edge = relationship which connects nodes

7 7 Social Network Analysis Early social network diagram of relationships among workers in a factory. The diagram illustrates the positions different workers occupy within the workgroup. Originally published in Roethlisberger, F., and Dickson, W. (1939). Management and the worker. Cambridge, UK: Cambridge University Press.

8 8 Examples of Networks The World Wide Web is a big network where pages are nodes and links are edges The Internet is a network where nodes are computers and edges are physical connections between devices

9 9 Examples of Networks Network of connections between devices within the Internet. Courtesy of Steve Jurvetson. Used under a Creative Commons license.

10 10 Network diagram of the #NSMNSS network community The tweets in the network were tweeted over the 75-day, 18-hour, 10-minute period from Friday, 01 July 2016 at 00:52 UTC to Wednesday, 14 September 2016 at 19:02 UTC.

11 11

12 12 NodeXL Ribbon in Excel

13 13 Import drop down

14 14 NodeXL Graph Gallery It is possible to upload network visualizations as well as workbooks and GraphML files to the NodeXL graph gallery The NodeXL graph gallery contains a number existing events, topics, and communities which have already been visualized

15 NodeXL Graph Gallery 15

16 16 Import settings The NodeXL workbook used to create a graph is often linked to at the bottom of the page. It can be downloaded and opened in order to create a similar looking graph. Graphs can be further customized e.g., adding or removing group labels.

17 NodeXL Graph Gallery 17

18 18 6 types of network structures

19 19 6 types of network structures

20 20 #WorldMentalHealthDay

21 21 Produces a number of metrics Most frequently shared URLs, Domains, Hashtags, Words, Word Pairs, Replied-To, Mentioned Users, and most frequent tweeters Produces metrics overall and by group of users (users are grouped by tweet content) By looking at different metrics associated with different groups (G1, G2, G3 etc) you can see the different topics that users may be talking about

22 22 Produces a number of metrics

23 23 Produces a number of metrics

24 24 Produces a number of metrics

25 25

26 26 Ethics In an academic context uploading to the graph gallery may not be permitted as participants are personally identifiable It is possible to use NodeXL to create offline graphs and to report aggregately

27 27 Questions?

28 To Discover And Understand.