The refresh command is similar to replot, with two major differences. refresh reformats and redraws the current plot using the data already read in. This means that you can use refresh for plots with inline data (pseudo-device '-') and for plots from datafiles whose contents are volatile. You cannot use the refresh command to add new data to an existing plot.

Mousing operations, in particular zoom and unzoom, will use refresh rather than replot if appropriate. Example:

plot 'datafile' volatile with lines, '-' with labels
100 200 "Special point"
# Various mousing operations go here
set title "Zoomed in view"
set term post
set output 'zoom.ps'

Copyright 1986 - 1993, 1998, 2004 Thomas Williams, Colin Kelley
Distributed under the gnuplot license (rights to distribute modified versions are withheld).