radar charts!
DESCRIPTION
Radar Charts!. Sheena Ellenburg. Outline. Overview Characteristics Nomenclature Usage Examples. Overview - Characteristics. 2-D 3 or more quantitative variables represented as axes starting from the same origin Equi -angular spokes called radii - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/1.jpg)
Radar Charts!
Sheena Ellenburg
![Page 2: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/2.jpg)
Outline
• Overview– Characteristics– Nomenclature
• Usage• Examples
![Page 3: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/3.jpg)
Overview - Characteristics
• 2-D• 3 or more quantitative variables represented
as axes starting from the same origin– Equi-angular spokes called radii– Lines drawn between points to form a polygon
• Relative position and angle of the axes generally not informative
![Page 4: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/4.jpg)
Overview - Nomenclature
• Also known as:– Web chart, cobweb chart (gridlines)– Spider chart (gridlines)– Star plot (no gridlines)– Irregular polygon– Polar chart (angular significance)– Kiviat chart (acceptable range bands)– Stardinates (Lanzenberger, 2003)
![Page 5: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/5.jpg)
Usage
• Ideal Data:– Multivariate (mas que 3)– Many Quantitative to One Nominal• Sports players attributes, companies, coffee beans
• Questions:– Which records/observations are most similar
(clustering)– Which records/observations are dissimilar• Are there outliers?
![Page 6: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/6.jpg)
When to Use a Radar Chart
• If you can’t accommodate different quantitative scales in a bar graph
• If the objective if to compare symmetry rather than magnitudes– Stephen Few’s resort example
• Data fits circular display intuitively (counter/clockwise reading order is either explicitly obvious, or is unimportant)– Clocked data– Coffee bean taste attributes
![Page 7: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/7.jpg)
Examples
![Page 8: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/8.jpg)
Spider/Web/Cobweb Chart
![Page 9: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/9.jpg)
Star Plot
![Page 10: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/10.jpg)
Polar Chart
![Page 11: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/11.jpg)
Kiviat Chart
![Page 12: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/12.jpg)
“Stardinates”
[Lanzenberger, 2003]: Lanzenberger, M., "The Stardinates - Visualizing Highly Structured Data", Proceedings of the Seventh International Conference on
Information Visualization (IV'03), 2003.
![Page 13: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/13.jpg)
Cupping Scores
• SCAA Cupping Protocols
• Sweet Marias Coffee Achives
![Page 14: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/14.jpg)
How to Taste an Oyster
• Tomato - The insider's guide to food and drink in Melbourne
![Page 15: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/15.jpg)
European Sensory Network: Sensory Profiles of three German beers
http://www.esn-network.com/635.html
![Page 16: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/16.jpg)
More examples of food research
• http://www.cjbio.net/html/innovation/food_application.asp• http://www.sciencedirect.com/science/article/pii/S09503293
09000226
![Page 17: Radar Charts!](https://reader036.vdocuments.us/reader036/viewer/2022062815/568168ff550346895de00c55/html5/thumbnails/17.jpg)
References
• Kiviat Diagram: www2.cs.uidaho.edu• Polar Chart: advsofteng.com• Spider chart, star plot: wikipedia.org• Stardinates: infovis-wiki.net• Verghisgroup.com – 3 Things to Think About – A
Warning Label for Radar Charts• Few, Stephen. Keep Radar Charts Below the Radar
– Far Below. 2005. Perceptual Edge.