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(emacs-lisp-intro.info)Readying a Graph

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Readying a Graph
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   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.

Columns of a graph

graph-body-print

How to print the body of a graph.

recursive-graph-body-print

Printed Axes

Line Graph Exercise