Rolling out a “How-To” Software Series
A long preface that ends with a list of posts on “how to” use NodeXL.
Looks very good!
Enjoy!
Rolling out a “How-To” Software Series
A long preface that ends with a list of posts on “how to” use NodeXL.
Looks very good!
Enjoy!
Posted in Excel, Graphics, NodeXL, Visualization | No Comments »
REVIEW: Crawling social media and depicting social networks with NodeXL by Eruditio Loginquitas.appears in three parts: Part 1 of 3, Part 2 of 3 and Part 3 of 3.
From part 1:
Surprisingly, given the complexity of the subject matter and the various potential uses by researchers from a range of fields, “Analyzing…” is a very coherent and highly readable text. The ideas are well illustrated throughout with full-color screenshots.
In the introduction, the authors explain that this is a spatially organized book—in the form of an organic tree. The early chapters are the roots which lay the groundwork of social media and social network analysis. Then, there is a mid-section that deals with how to use the NodeXL add-on to Excel. Finally, there are chapters that address particular social media platforms and how data is extracted and analyzed from each type. These descriptors include email, thread networks, Twitter, Facebook, WWW hyperlink networks, Flickr, YouTube, and wiki networks. The work is surprisingly succinct, clear, and practical.
Further, it is written with such range that it can serve as an introductory text for newcomers to social network analysis (me included) as well as those who have been using this approach for a while (but may need to review the social media and data crawling aspects). Taken in total, this work is highly informative, with clear depictions of the social and technical sides of social media platforms.
From part 2:
One of the strengths of “Analyzing Social Media Networks with NodeXL” is that it introduces a powerful research method and a tool that helps tap electronic media and non-electronic social network information intelligently, in a way that does not over-state what is knowable. The authors, Derek Hansen, Ben Schneiderman, and Marc A. Smith, are no strangers to research or academic publishing, and theirs is a fairly conservative approach in terms of what may be asserted.
To frame what may be researched, the authors use a range of resources: some generalized research questions, examples from real-world research, and step-by-step techniques for data extraction, analysis, visualization, and then further analysis.
From part 3:
What is most memorable about “Analyzing Social Media Networks with NodeXL” is the depth of information about the various social network sites that may be crawled using NodeXL. With so many evolving social network platforms, and each capturing and storing information differently, it helps to know what an actual data extractions mean.
I haven’t seen the book personally, but from this review it sounds like a good model for technical writing for a lay audience.
For that matter, a good model for writing about topic maps for a lay audience. (Many of the issues being similar.)
Posted in NodeXL, Social Graphs, Social Media, Social Networks | No Comments »
NodeXL: Network Overview, Discovery and Exploration for Excel
From the webpage:
NodeXL is a free, open-source template for Microsoft® Excel® 2007 and 2010 that makes it easy to explore network graphs. With NodeXL, you can enter a network edge list in a worksheet, click a button and see your graph, all in the familiar environment of the Excel window.
NodeXL Features
- Flexible Import and Export Import and export graphs in GraphML, Pajek, UCINet, and matrix formats.
- Direct Connections to Social Networks Import social networks directly from Twitter, YouTube, Flickr and email, or use one of several available plug-ins to get networks from Facebook, Exchange and WWW hyperlinks.
- Zoom and Scale Zoom into areas of interest, and scale the graph’s vertices to reduce clutter.
- Flexible Layout Use one of several “force-directed” algorithms to lay out the graph, or drag vertices around with the mouse. Have NodeXL move all of the graph’s smaller connected components to the bottom of the graph to focus on what’s important.
- Easily Adjusted Appearance Set the color, shape, size, label, and opacity of individual vertices by filling in worksheet cells, or let NodeXL do it for you based on vertex attributes such as degree, betweenness centrality or PageRank.
- Dynamic Filtering Instantly hide vertices and edges using a set of sliders—hide all vertices with degree less than five, for example.
- Powerful Vertex Grouping Group the graph’s vertices by common attributes, or have NodeXL analyze their connectedness and automatically group them into clusters. Make groups distinguishable using shapes and color, collapse them with a few clicks, or put each group in its own box within the graph. “Bundle” intergroup edges to make them more manageable.
- Graph Metric Calculations Easily calculate degree, betweenness centrality, closeness centrality, eigenvector centrality, PageRank, clustering coefficient, graph density and more.
- Task Automation Perform a set of repeated tasks with a single click.
Homepage for NodeXL, which uses Excel as the framework for display and exploration of graphs.
There is something to be said about software that ties itself to other successful software. I think that is “increased chances of success.” Don’t you?
Posted in Excel, Graphs, Networks, NodeXL | No Comments »
NodeGL: An online interactive viewer for NodeXL graphs uploaded to Google Spreadsheet.
Martin Hawksey writes:
Recently Tony (Hirst) tipped me off about a new viewer for Gephi graphs. Developed by Raphaël Velt it uses JavaScript to parse Gephi .gefx files and output the result on a HTML5 canvas. The code for the viewer is on github available under a MIT license if you want to download and remash, I’ve also put an instance here if you want to play. Looking for a solution to render NodeXL data from a Google Spreadsheet in a similar way here is some background in the development of NodeGL – an online viewer of NodeXL graphs hosted on Google Spreadsheets
Introduction to NodeGL.
Posted in Gephi, Graphs, NodeGL, NodeXL | No Comments »
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