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March 12, 2014 Data Visualization John Stasko School of Interactive Computing Georgia Institute of Technology [email protected] Data Visualization “The use of computer-supported, interactive visual representations of data to amplify cognition” 3 Visuals help us think Provides a frame of reference, temporary storage area Cognition Perception Pattern matching 4 1. Presentation Communicate data and ideas Explain and inform Influence and persuade Provide evidence and support 5 AJC, Jan. 3, 2014 6 http://infographicsnews.blogspot.com/2009/04/mantras-joe-lertolas-maps.html 7 www.cdc.gov/mmwr/preview/mmwrhtml/mm5212a1.htm 8 2. Analysis understand, compare, decide, judge, evaluate, assess, determine, … 9 Many Data Analysis Approaches Statistics Database & information retrieval Data mining Machine learning 10 Visualization most useful in exploratory data analysis Don’t know what you’re looking for Don’t have a priori questions Want to know what questions to ask 11 SellTrend Web-based airline booking requests Help recognize irregularities and analyze what the problem is http://www.cc.gatech.edu/gvu/ii/selltrend/ 12 Liu, Sullivan, Stasko TVCG (InfoVis) ‘09 SnapShot Present an entire year of NHL shot data For ice hockey analytics and strategists http://www.cc.gatech.edu/gvu/ii/sportvis/ 13 Pileggi, Stolper, Boyle, Stasko TVCG (InfoVis) ‘12 http://www.cc.gatech.edu/gvu/ii/jigsaw Jigsaw Visual analytics of large text document collections Görg, Liu, Kihm, Choo, Park, & Stasko TVCG ‘13 14 Project Process Model Design visualization techniques and systems Understand users and their problem Iterate repeatedly Revisit as needed Draw upon knowledge of existing techniques and experience applying them 15 Demonstrate to users for feedback, reactions Upcoming Talk Quarterly Analytics Collaborative Auditorium at Emory Hospital Thursday May 8, 1-3 pm Dr. Sheri Chernetsky Tejedor Chief Research Information Officer, Emory University School of Medicine 16 My Research http://www.cc.gatech.edu/gvu/ii 17