Heuristic criteria for selecting an optimal aspect ratio in a two-variable line plot
Abstract. Line plots encode a series of slopes from adjoining coordinates and aim to
reveal suggestive patterns in the sequential rates of change. The choice of
aspect ratio imposed on the line plot largely determines the judged prevalence
of patterns in the bivariate series and the degree of steepness in the rates of
change. Choosing an appropriate aspect ratio is key to designing informative
line plots. The optaspect command calculates the optimal aspect ratio
in a two-variable line graph using a number of heuristic criteria.
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Demetris Christodoulou
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optaspect, aspect ratio, line plot, time series, banking to 45^circ
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