1 / 17

Radar Charts!

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

zudora
Download Presentation

Radar Charts!

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Radar Charts! Sheena Ellenburg

  2. Outline • Overview • Characteristics • Nomenclature • Usage • Examples

  3. Overview - Characteristics • 2-D • 3 or more quantitative variablesrepresented 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

  4. 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)

  5. Usage • Ideal Data: • Multivariate (masque 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?

  6. 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

  7. Examples

  8. Spider/Web/Cobweb Chart

  9. Star Plot

  10. Polar Chart

  11. Kiviat Chart

  12. “Stardinates” [Lanzenberger, 2003]: Lanzenberger, M., "The Stardinates - Visualizing Highly Structured Data", Proceedings of the Seventh International Conference on Information Visualization (IV'03), 2003.

  13. Cupping Scores • SCAA Cupping Protocols • Sweet Marias Coffee Achives

  14. How to Taste an Oyster • Tomato - The insider's guide to food and drink in Melbourne

  15. European Sensory Network: Sensory Profiles of three German beers http://www.esn-network.com/635.html

  16. More examples of food research • http://www.cjbio.net/html/innovation/food_application.asp • http://www.sciencedirect.com/science/article/pii/S0950329309000226

  17. 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.

More Related