Triangular plots are maps that display information in the shape of a triangle. A triangular plot is based on three variables and depicts the ratios of the three variables as positions on a equilateral triangle.
The above image is a triangular plot that is the estimate of the probable outcome of the 2008 election, based on opinion polls found online. The axes of the figure show the estimated fraction of the population intending to vote for each of the major parties; the white circle shows the current estimate from opinion polls. The colored areas show the regions of the plot in which each of the corresponding major parties would win a majority in Parliament.
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