Data visualization training session HELCOM
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I held a data visualization training session at the HELOM Secretariat on 28th November 2018. The focus was on making more effective graphs.
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Data visualization training session HELCOM
- 1. How to make more effective graphs Training session on data visualization organized by Manuel Frias HELCOM Secretariat, 28th November 2018
- 2. What is an effective data visualization? What is the right graph for a dataset? How can we improve the style of a graph? OBJECTIVE
- 3. Once upon a time I used to make graphs like this...
- 4. Which tool do you normally use?
- 5. Then, I started to become interested in data visualization and realized that this was not the best way to visualize data
- 6. Alberto Cairo, 2016: The truthful art A data visualization should be Truthful—it must not lie Functional—you can perform basic operations like compare Beautiful—it must be pleasant to your eyes Insightful—you should learn something from the graph Enlightening—it opens your eyes
- 7. Let’s test these principles with my (horrendous) graph
- 8. Truthful Which tool do you normally use in the map service?
- 9. Truthful Which tool do you normally use in the map service? Functional
- 10. Truthful Which tool do you normally use in the map service? Functional Beautiful
- 11. Truthful Which tool do you normally use in the map service? Functional Beautiful Insightful
- 12. Truthful Which tool do you normally use in the map service? Functional Beautiful Insightful Enlightening
- 13. Let’s remake the graph and run the test again...
- 14. 0 0 2 2 3 3 3 3 5 5 6 8 8 9 9 Buffer Planning Clear Help Query Measure SnapShoot Download Full Extent Previous Select Zoom Out Identify Zoom In Pan Only basic functionalitiesare used in the map service Number of answers to the question "Which tool do you normally usein the map service?" Truthful
- 15. 0 0 2 2 3 3 3 3 5 5 6 8 8 9 9 Buffer Planning Clear Help Query Measure SnapShoot Download Full Extent Previous Select Zoom Out Identify Zoom In Pan Only basic functionalitiesare used in the map service Number of answers to the question "Which tool do you normally usein the map service?" Truthful Functional
- 16. 0 0 2 2 3 3 3 3 5 5 6 8 8 9 9 Buffer Planning Clear Help Query Measure SnapShoot Download Full Extent Previous Select Zoom Out Identify Zoom In Pan Only basic functionalitiesare used in the map service Number of answers to the question "Which tool do you normally usein the map service?" Truthful Functional Beautiful
- 17. 0 0 2 2 3 3 3 3 5 5 6 8 8 9 9 Buffer Planning Clear Help Query Measure SnapShoot Download Full Extent Previous Select Zoom Out Identify Zoom In Pan Only basic functionalitiesare used in the map service Number of answers to the question "Which tool do you normally usein the map service?" Truthful Functional Beautiful Insightful
- 18. 0 0 2 2 3 3 3 3 5 5 6 8 8 9 9 Buffer Planning Clear Help Query Measure SnapShoot Download Full Extent Previous Select Zoom Out Identify Zoom In Pan Only basic functionalitiesare used in the map service Number of answers to the question "Which tool do you normally usein the map service?" Truthful Functional Beautiful Insightful Enlightening
- 20. Steps Find the message Find the shape of the data
- 21. What is the right graph for a dataset?
- 22. Alternative 1: follow a guideline
- 26. Alternative 2: learn the basics
- 27. Enable accurate comparisons Enable general comparisons Position along common scale Position along common but unaligned scales Length Angle Area Volume Shading Hue Cleveland, McGill, 1984 adapted from Alberto Cairo, 2016: The truthful art This scale is from, perhaps, the most famous paper in data visualization
- 28. Let’s put it in practice.What’s the best way to compare this data?
- 29. A B C D E EDCBA ED CBA Length Angle Area Shade Adapted from Alberto Cairo, 2016: The truthful art A B C D E
- 30. A B C D E EDCBA ED CBA Length Angle Area Shade Adapted from Alberto Cairo, 2016: The truthful art A B C D E You were right
- 31. In fact, according to data visualization author Stephen Few, most quantitative analyses can be performed effectively with only four graphs...
- 32. Bar Line Point Box Stephen Few, 2009: Now you see it
- 33. Hold on... where are the pies?
- 34. Pies are for eating them!
- 35. A B C D E D B E A Test: which graph is better to compare values Inspired by Naomi Robbins, 2013: Creating more effective graphs
- 36. Source: wtf.viz Pie charts have been misused...
- 37. However, I don't think they are always bad. The next slide was shown at the Plan Bothnia project final conference.We wanted to show how much time we spent working on the project.
- 38. We have worked 18 months 2% of our life!
- 39. Exercise Is it effective?Why? Is there a better alternative? Sketch
- 43. What about other graphs besides bar, line, point and box?
- 44. Slope graph Dot plot Chord diagram Sankey diagram Cycle plot Small multiple
- 45. Slope graph
- 48. Dot plot
- 49. Before Source: HELCOM Maritime Assessment
- 50. After
- 51. Chord diagram
- 52. Source: HELCOM Maritime Assessment
- 53. How can we improve the style of a graph?