Before any actual plotting calls are made, a graphics program must
plinit, is the main initialization routine for PLplot. It
sets up all internal data structures necessary for plotting and
initializes the output device driver. If the output device has not
already been specified when
plinit is called, a list of valid
output devices is given and the user is prompted for a choice.
Either the device number or a device keyword is accepted.
There are several routines affecting the initialization that must
be called before
plinit, if they are used. The
plsdev allows you to set the device explicitly. The
plsetopt allows you to set any command-line option
internally in your code. The function
plssub may be called to
divide the output device plotting area into several subpages of equal
size, each of which can be used separately.
One advances to the next page (or screen) via
pladv. If subpages
are used, this can be used to advance to the next subpage or to a