The replot command without arguments repeats the last plot or splot command. This can be useful for viewing a plot with different set options, or when generating the same plot for several devices.
Arguments specified after a replot command will be added onto the last
plot ( splot) command (with an implied ',' separator) before it is
repeated. replot accepts the same arguments as the plot ( splot)
commands except that ranges cannot be specified.
See command line-editing for ways to edit the last plot
( splot) command.