Speaking Stata: Paired, parallel, or profile plots for changes, correlations, and other comparisons
Nicholas J. Cox
Department of Geography
Durham University
Durham, UK
[email protected]
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Abstract. Paired, parallel, or profile plots showing the values of two variables may be
constructed readily using a combination of graph twoway commands. This
column explores the principles and practice of such plot-making, considering
both wide and long (panel or longitudinal) data structures in which such data
may appear. Applications include analysis of change over time or space and
indeed any kind of correlation or comparison between variables. Such plots may
be extended to show numeric values and associated name information.
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Nicholas J. Cox
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profile plot, parallel coordinates plot, parallel line plot, pair-link diagram, bumps charts, barometer charts, graphics, panel data, longitudinal data, arrows, twoway
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