When gnuplot is run, it looks for an initialization file to load. This
file is called .gnuplot on Unix and AmigaDOS systems, and GNUPLOT.INI
on other systems. If this file is not found in the current directory, the
program will look for it in the home directory (under AmigaDOS,
Atari(single)TOS, MS-DOS and OS/2, the environment variable gnuplot should
contain the name of this directory). Note: if NOCWDRC is defined during the
installation, gnuplot will not read from the current directory.
If this file is found, gnuplot executes the commands in this file. This
is most useful for setting the terminal type and defining any functions or
variables that are used often.