Choosel - a web-based environment for entry-level visual data analysis
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Presentation of Choosel ( code.google.com/p/choosel/ ) in the VisID lab at the University of Victoria. ...

Presentation of Choosel ( code.google.com/p/choosel/ ) in the VisID lab at the University of Victoria.
Choosel is a web-based environment that aims at facilitating flexible visual data exploration for information visualization novices.

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Choosel - a web-based environment for entry-level visual data analysis Presentation Transcript

  • 1. CHOOSEL A WEB-BASED ENVIRONMENT FOR ENTRY-LEVEL VISUAL DATA ANALYSIS Lars Grammel, 01-Sep-2010 CHISEL Group, University of Victoria
  • 2. Goal 2 Provide a Flexible and Intuitive Visual Data Analysis Environment for InfoVis Novices
  • 3. 3 Video
  • 4. Features 4  Several visualizations types  charts, graph, timeline, map, tag cloud  Multiple views  View coordination using drag & drop  Drop target highlighting & previews  Highlighting of items across multiple views  Custom sets that act as selections  Filtered views & synchronized selection  Workspace persistence & sharing  Undo / redo
  • 5. Design Constraints 5  Small data sets (up to 5000 items)  Heterogeneous data  Web-based environment  Reuse third party visualization components  Multiple coordinated views  Tight integration of visualization construction and data analysis
  • 6. Design Choices 6  Written in GWT (Java to JavaScript compilation)  Need to integrate different components (e.g. Flash, JavaScript)  Author is familiar with Java  Better tool support (unit testing, debugging, refactoring)  Deployed on Google App Engine (but this is not required)  Applications tailor Choosel Framework to domain
  • 7. Architecture 7 Choosel Client (in Browser) View Coordination Google Maps Help and Branding Flexvis Undo / Redo Server Management Views Simile Timeline Workspace Persistence & Workspace Sharing Management Protovis Charts Data Access Data Management Tag Cloud
  • 8. Choosel Applications 8  Bio-Mixer  Biomedical Ontology Exploration  Work Item Explorer  IBM Jazz Issue Tracking Data Choosel is open source! http://code.google.com/p/choosel/
  • 9. 9 Demo
  • 10. Usability Study 10 Does our interaction approach work in practice? What usability issues are hampering the interactions? Laboratory User Study with 8 Participants (& 1 Pilot)  Video Tutorial  Spatio-temporal analysis (2 Tasks)  Earthquakes & Tsunami Warnings  Concept analysis (4 tasks)  Biomedical Ontology Data  Evaluation Questionnaire  Ratings, Open Questions
  • 11. Reactions 11 “Visually pleasing to the eye. Very intuitive in that for the most part it made sense what each window did in terms of function. The possibilities of what one can produce with this easy interface seem enormous.” P7 “[I liked that] everything is connected and interactive.” P9 “It is hard to understand what some of the function does.” P3
  • 12. Task Completion 12 Spatio-Temporal Tasks Concept Tasks on Biomedical Data P2 f-ps f-ps f-s f-s a n-a P3 f-ps f-ps f-s f-s f-ps n-a P4 f-s f-ps f-s f-s n-a n-a P5 f-s f-s f-s f-s f-ps n-a P6 f-ps f-ps f-s f-s f-ps a P7 f-s f-ps f-s f-ps f-ps f-s P8 f-ps f-ps f-s f-s f-ps n-a P9 f-ps f-s f-s f-s f-s f-s 1 2 1 2 3 4 f-s: finished, succeeded f-ps: finished, partially succeeded a: attempted n-a: not attempted
  • 13. Usability/Usefulness of Features 13
  • 14. Multiple Windows 14 “I liked being able to view the timeline and the map at the same time when exploring earthquake data.” P5 “Resizing windows was annoying especially since there is a lot of space on the screen that I felt was not used because the default window size is small.” P5 63% of the participants resized and moved windows frequently.
  • 15. Drag and Drop 15 “When dragging it was very helpful to see where you can drag the item to (by lighting up the possible windows).” P2 “The drag and drop […] had what you needed right there. At first glance everything seemed easier, but as you get deeper into the tasks I got confused on how things actually worked.” P7
  • 16. Highlighting of Items and Sets 16 “The use of selections and highlighting in the different windows is very helpful to organize what one is doing.” P2
  • 17. Custom Sets 17 “I liked the fact that I could easily look for a specific earthquake set.” P4 “I could not use a lasso function to quickly highlight multiple items in any view.” P5
  • 18. Current & Future Work 18  More Visualizations  Visualization Configuration  Automatic Visualization  Faceted Navigation
  • 19. Thank you! 19 Choosel is open source! http://code.google.com/p/choosel/ Lars Grammel CHISEL Group, University of Victoria Lars.Grammel@gmail.com