ibrary, you need to ensure that the system can find the library at run time. You also need to ensure that the program can find the PGPLOT font file which it needs in order to draw characters (text).</p>

<p>Some aspects of the behavior of PGPLOT programs can be changed by defining <i>environment variables</i> before running the program. These are also described in this chapter.</p>

<h2>Compiling and Linking a Fortran-77 Program</h2>

<p>Some examples, assuming the source code is in a file called <span
clas