Skyline charts by Bill Caemmerer

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This presentation is an IxDA London redux of Bill Caemmerer's presentation at Interaction12 in Dublin.

This presentation is an IxDA London redux of Bill Caemmerer's presentation at Interaction12 in Dublin.

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Transcript

  • 1. Bill Caemmerer’sTelling the Data Comparison Story Using Skyline Graph (instead of two pies) IxDA London Redux 21 February 2012 Virginia Cagwin @vcagwin
  • 2. Telling What HappenedJust like every picture, every graph tells a story, or it should. Frequently the story we want to tell is a comparison to the past or to our plans, a “what happened” story. - Bill Caemmerer
  • 3. USA UK Petrol Mobile Phone Entertainment Coffee Mobile Phone Coffee PetrolFood Travel Entertainment Food Travel area= (angle/360)*π r2
  • 4. Tough Questions (for pie charts)• How much did any item change?• What do you mean by “percent” 20% +5%=21%..??
  • 5. Comparison Stories: “what happened?”
  • 6. We Want to Know• Relative changes (How many adverts can I air?)• Biggest most important changes (How much money will I lose?)
  • 7. What makes details easy to see?
  • 8. Horizons
  • 9. Silhouettes
  • 10. • Variation from a horizon line• Height and width• Size or area
  • 11. UK175%150%125%100%75%50%25% USA
  • 12. UK 175% 150% area = x*y 125% 100% 75% 50% 25% Food Travel Entertainment Coffee Mobile Petrol 32 26 16 6 14 4 USA
  • 13. UK 175% 150% 125% 100% 75% 50% 25% Food Travel Entertainment Coffee Mobile Petrol 32 26 16 6 14 4 USA
  • 14. UK 175% 44 150% 125% 5 33 17 7 100% 75% 50% 5 25% Food Travel Entertainment Coffee Mobile Petrol 32 26 16 6 14 4 USA
  • 15. Scales well Horizontally
  • 16. More Info• Bar-Mekko Charts• Variable Width Column Charts• Variwide Charts• Coming Soon: skylinecharts.net• bill@caemmerer.net