Slides of the course on big data by Clement Levallois from EMLYON Business School. For business students. Check the online video connected with these slides. -> How is data visualization relevant for business. List of tools and resources to advance a dataviz project for small and big companies.

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Big data & cross-platform analytics
MOOC lectures Pr. Clement Levallois

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Data visualization
Data Visualization

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“The ability to collect, store, and manage data is increasing quickly, but our ability to understand it remains constant.”
Ben Fry
Co-creator or Processing and Principal at Fathom
The problem to be solved

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“The picture-examining eye is the best finder we have of the wholly unanticipated.”
“ [Exploratory Data Analysis] is an approach to analyzing datasets to summarize their main characteristics in easy-to-understand form, often with visual graphs, without using a statistical model or having formulated a hypothesis”
Data visualization: inspired by John Tukey’s “Exploratory Data Analysis”
Tukey et al., 1983

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Dataviz draws from different communities
Information visualization / Human Computer Interaction
how do humans interact with the technology?
Cartography
focus on Geographical Information Systems
Information design
What are the best designing practice?

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The mother of all modern dataviz?
•“The map of the market”
•Created in 1998 for smartmoney.com
•Still online and used!
•Author: Matt Wattenberg
•How to read it
–Colors represent change in stock price
–Surface represents market capitalization
•What it does
–Evolution by sectors at a glance
–Facilitates comparisons / outlier detection
–Drilling: clicking on a sector zooms on it.

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Key examples of dataviz
•2010: Memorial for the victims of the Twin Towers
–http://blog.blprnt.com/blog/blprnt/all-the-names/picture-2-3
–Author: Jer Thorp (www.blprnt.com)
•2011: OECD Better Life Index
–http://www.oecdbetterlifeindex.org/
–Author: Moritz Stefaner (www.truth-and-beauty.net)
•2012: Realtime map of wind speed in the US
–http://hint.fm/wind/
–Authors: Fernanda Viégas and Martin Wattenberg (www.hint.fm)
•2013: The story of every known drone strike and victim in Pakistan.
–http://drones.pitchinteractive.com/
–Authors: Pitch Interactive (http://pitchinteractive.com/)

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Twin Tower Memorial

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OECD Better Life Index

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Drone strikes and victims, 2005-2013

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What makes a good data visualization?
1.A pre-condition: data must be respected – no photoshopping!
2.A « trademark »: data remains largely disaggregated
3.A result: the audience learns something new, via a process of discovery
4.A follow-up: the experience is « addictive », it is memorable and one gets drawn back to it.

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Ben Fry’s process of creation in 7 steps
From Fry (2005) PhD dissertation: Computational Information Design
available at: benfry.com/phd/

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Data visualization: what use for business?
•Exploration
–Is there any interesting pattern / segment to be found in my customer data?
•Communication
–Here is the visual summary of my conclusions, for my manager
–Here is a visual explanation of the analytical solution I push to the client
•Control
–Monitoring monthly indicators and trends for production, sales etc. on a dashboard
•Emotion
–Conveying a critical message in a communication campaign through a powerful visualization

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Custom
Solutions to create data visualizations
•By hand
One-off projects
Data of limited size
Bleeding edge design
Large set of features
Fit for big data
Standard design
Can deploy to the entire org
Small agencies Teams inside orgs
BI solutions
Off the shelf

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1.Data processing
–R, Python and Matlab are favored both in the academic community & in the industry
–Java is used heavily for data management in companies, also used in academia for data- intensive tasks.
2.Visualization
–Processing (Java-based): to create videos or installations.
–Javascript (D3.js, three.js, Google Chart API, SigmaJS etc.): to create web-based animations
–Flash (Flash itself or Flare): to create desktop applications.
–R and Python (some packages): to create pictures – often “scientific” in style.
3.Gimp, Inkscape, PhotoShop or Illustrator to polish the result for print outputs.
1. Using programmatic tools
HOW

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But why would I bother with programming? -> You get much more flexibility and creativity. -> Here is just a sample of what can be done in javascript with D3js.org

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2. Hiring an agency
A choice of 8 outstanding solutions
www.tulpinteractive.com (NL) www.truth-and-beauty.net (DE) www.periscopic.com (US, Portland) www.interactivethings.com/ (CH)
www.o-c-r.org (US, NYC)
www.dataveyes.com (FR)
www.fathom.info (US, Boston)
www.pitchinteractive.com (US, Oakland)

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•Gephi
•NodeXL
•VosViewer
3. “click and point” applications
•ArcGIS
•QGIS
•MapBox
•Google Fusion Tables
•Tableau
•Synerscope
•joliCharts
•Plot.ly
•Excel
•Data Wrapper
•Raw http://app.raw.densitydesign.org/
Drawing networks
Drawing maps
Drawing networks, charts and / or maps

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4. BI integrated solutions
•Tableau
•Qlik Sense
•BIME Analytics
•Palantir
•Spotfire
•SiSense

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5. To go further…
•Critical thinking on data visualization
–http://datastori.es
-> A podcast series
–VizWiz
–the Why Axis
–Junk Charts
–WTF Visualizations
•Great lists of tools and resources
–Visualisingdata.com
–Datavisualization.ch

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This slide presentation is part of a course offered by EMLYON Business School (www.em-lyon.com).
Contact Clement Levallois (levallois [at] em-lyon.com) for more information.