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# Principles of Analytical Design - Visually Meetup - Sept. 2011

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• 1. Principles of Analytical DesignNicolas Garcia Belmonte - @philogb - Sept. 2011
• 2. I use Web Standards to create Data Visualizations.
• 3. I’m the author of two JavaScript data visualization frameworks. PhiloGL JavaScript InfoVis Toolkit
• 4. Fundamental Principles of Analytical Design (Tufte)1 - Comparisons2 - Causality, mechanism, structure, explanation3 - Multivariate analysis4 - Integration of evidence5 - Documentation6 - Content counts most of all Source: Edward Tufte - Beautiful Evidence
• 5. 1 - Show comparisons, contrasts, differences.
• 6. Source: Randall Munroe - http://xkcd.com/
• 7. Source: Randall Munroe - http://xkcd.com/
• 8. Lie Factor“The representation of numbers, as physically measured on the surface of the graphic itself, should be directly proportional to the quantities represented.” Source: Tufte 1991
• 9. Lie Factor1985: the line representing 27.5 m/g is 5.3 inches long1978: the line representing 18.0 m/g is 0.6 inches long Lie Factor: 783 / 53 = 14.8! Source: The New York Times
• 10. Sometimes it’s useful to emphasize something.
• 11. 2 - Show causality, mechanism, explanation, systematic structure.
• 12. Source: Semiology ofGraphics - Jacques Bertin
• 13. Charles Minard’s data-map describes the successive lossesin men of the French army during the French invasion of Russia in 1812 Source: Edward Tufte - Beautiful Evidence
• 14. 3 - Show multivariate data; that is, show more than 1 or 2 variables.
• 15. Channel Ranking vs. Data TypeQuantitative Ordinal Nominal Position Position Position Length Density Hue Angle Saturation Texture Slope Hue Connection Area Texture Containment Volume Connection Density Density Containment Saturation Saturation Length Shape Hue Angle Length Texture Slope Angle Connection Area Slope Containment Volume Area Shape Shape VolumeSource: Tamara Munzner. Chapter 27, p 675-707, of Fundamentals of Graphics, Third Edition, by Peter Shirley et al. AK Peters, 2009
• 16. Maps for height, hair color and cephalic index distribution Source: Semiology of Graphics - Jacques Bertin
• 17. Map for height, hair color and cephalic index distribution Source: Semiology of Graphics - Jacques Bertin
• 18. Source: Reddit.com
• 19. 4 - Completely integrate words, numbers, images, diagrams.
• 20. Source:Vancouver Map
• 21. Source: Carmel Map
• 22. Source: Zurich Map
• 23. Source: The Hague Map
• 24. Source: Paris Bus Map
• 25. 5 - Thoroughly describe the evidence. Provide a detailedtitle, indicate the authors and sponsors, document the data sources, show complete measurement scales, point out relevant issues.
• 26. Source: Beautiful Evidence - Edward Tufte
• 27. 6 - Analytical presentations ultimately stand or falldepending on the quality, relevance and integrity of their content.
• 28. Source: Wikipedia
• 29. Other Useful Principles 6 - Interactivity 7 - Personalization / Identiﬁcation 8 - Aesthetic value
• 30. Other Useful Principles Source: The New York Times
• 31. Thanks! Nicolas Garcia Belmonte@philogb http://philogb.github.com/