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eintr: Readying a Graph

 
 15 Readying a Graph
 *******************
 
 Our goal is to construct a graph showing the numbers of function
 definitions of various lengths in the Emacs lisp sources.
 
    As a practical matter, if you were creating a graph, you would
 probably use a program such as ‘gnuplot’ to do the job.  (‘gnuplot’ is
 nicely integrated into GNU Emacs.)  In this case, however, we create one
 from scratch, and in the process we will re-acquaint ourselves with some
 of what we learned before and learn more.
 
    In this chapter, we will first write a simple graph printing
 function.  This first definition will be a “prototype”, a rapidly
 written function that enables us to reconnoiter this unknown
 graph-making territory.  We will discover dragons, or find that they are
 myth.  After scouting the terrain, we will feel more confident and
 enhance the function to label the axes automatically.
 

Menu

 
· Columns of a graph
· graph-body-print            How to print the body of a graph.
· recursive-graph-body-print
· Printed Axes
· Line Graph Exercise
 

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