Table of Contents
We describe advanced use of PLplot in this chapter which
  includes many cross-references to elements of our common (C) API that use PLplot C types such as
  PLFLT and PLINT.  For full documentation of all PLplot C types see
  here.  The best way to learn how
  to use our common API for the language of your choice is to look at
  our standard set of
  examples.  For additional language documentation you should
  consult the various chapters in Part III, “ Supported computer languages ” as
  well.