Classy Graph

A scatter graph based on chapter 6 of The Visual Display of Quantitative Information by Edward R. Tufte.

• Don't use any more of a frame around the data area than necessary
• When possible, turn the frame itself into data
• Avoid displaying arbitrarily/unnecessary labels along the frame

Price (USD) of a Big Mac in Canada, Britain, and America over time

Source: the Big Mac Index by The Economist.

For a more general/powerful graphing library with a similarly small footprint, see Layer Cake.