- A triangular plot usually uses three variables which sum to a constant. It graphically depicts the ratios of the three variables as positions in an equilateral triangle.
- 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 coloured asses show the regions of the plot in which -- under the assumption of uniform national swing -- each of the corresponding major parties would win a majority in Parliament.
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