The `save` command saves user-defined functions, variables, `set`
(Note:set-show ) options, or all three, plus the last `plot`
(Note:plot ) ((`splot` (Note:splot )) command to the specified file.
Syntax:
save {<option>} '<filename>'
where <option> is `functions` (Note:functions ), `variables`
(Note:variables ) or set. If no option is used, `gnuplot`
(Note:gnuplot ) saves functions, variables, set options and the last plot
(`splot`) command.
`save`d files are written in text format and may be read by the `load`
(Note:load ) command.
The filename must be enclosed in quotes.
Examples:
save 'work.gnu'
save functions 'func.dat'
save var 'var.dat'
save set 'options.dat'