How can I use ZXPLOT?
To use ZXPLOT, you have to first install the ZXPLOT on your computer.
  
  The source code and the binary object libraries for most popular platforms can 
  be obtained from anonymous FTP server at ftp://ftp.caps.ou.edu/pub/ZXPLOT3.
An interactive installation script called INSTALL is included in the package. 
  This script will compile and place the library package in a user designated 
  directory and create compile and link scripts such as zxncarf77, zxpostf77, 
  zxncarf90 and zxpostf90 inside subdirectory bin. You will be instructed by the 
  script to add this bin directory into your shell command search path.
  
  After the ZXPLOT is installed and the command search path set, the commands 
  to compile and execute a user's plotting program prog.f are, assuming f77 is 
  used: 
  
  zxncarf90 prog.f 
  a.out 
  
  for metafile output, and 
  
  zxpostf90 prog.f 
  a.out 
  
  for PostScript (trademark of Adobe Systems, Inc.) output. By default the output 
  iis called zxout.ps. The actual name of the compile and link scripts depends 
  on the name of your fotran compiler that you provided when running INSTALL script.
  
  Every user is strongly recommend to test out the installation by running one 
  of the example programs in examples directory.
  
  The NCAR graphics metafile output can be handled by tools (e.g. idt and ctrans) 
  that come with the NCAR Graphics package. The PostScript output (default name 
  is zxout.ps) can be sent to a PostScript printer or viewed using PostScript 
  viewers such as ghostview; (GNU software available on the internet).