Slopegraph – In General and in R

Slopegraph:

  • Suppose you have a table of two columns) and that you want to show graphically how the (two) elements of each row correspond in terms of value. A Slopegraph is useful in this context.
  • The originator, Edward Tufte (http://www.edwardtufte.com), says (http://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=0003nk&topic_id=1) “Slopegraphs compare changes over time for a list of nouns located on an ordinal or interval scale.”  Basically: Any time you’d use a line chart to show a progression of univariate data among multiple actors over time, you might have a good candidate for a slopegraph.  But some people have found it useful beyond this context.

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