x: A matrix with each pair of rows representing a min and max for the bar.
names: Place a name in each bar.
names_height: Where the names should go
col: What colors to use for the bars. There should be half as many specified as rows of x
...: passed to plot.window.
Details
A similar graphic on the weather page of the New York Times
shows bars for record highs and lows, normal highs and lows and actual (or predicted) highs or lows for 10 days of weather. This graphic succintly and elegantly displays a wealth of information. Intended as an illustration of the polygon function.