Bill Caemmerer’sTelling the Data Comparison Story Using Skyline Graph (instead of two pies) IxDA London Redux 21 February 2012 Virginia Cagwin @vcagwin
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
USA UK Petrol Mobile Phone Entertainment Coffee Mobile Phone Coffee PetrolFood Travel Entertainment Food Travel area= (angle/360)*π r2
Tough Questions (for pie charts)• How much did any item change?• What do you mean by “percent” 20% +5%=21%..??