Bilateral Graph

Bilateral graphs are a hybrid of a histograms that are used to display multiple variables on a single graph. The goal is generally to use three standard bars to represent positive data on one side and negative data on the other side with comparing it to a middle bar that is the zero line. The map below represents the approval ratings of leadership in the china, with the positive data being the approval, the negative data being the negative data, and the dont know being the zero line.




http://media.gallup.com/poll/graphs/080429China2Graph2_GASJIDHUQfredo.gif