GNUPlot Manual

50 gnuplot 4.0 33 REREAD
32 Replot
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 or splot command (with
an implied ’,’ separator) before it is repeated. replot accepts the same arguments as the plot and splot
commands except that ranges cannot be specified. Thus you can use replot to plot a function against
the second axes if the previous command was plot but not if it was splot, and similarly you can use
replot to add a plot from a binary file only if the previous command was splot.
N.B. — use of
plot ’-’ ; ... ; replot
is not recommended. gnuplot does not store the inline data internally, so since replot appends new
information to the previous plot and then executes the modified command, the ’-’ from the initial plot
will expect to read inline data again.
Note that replot does not work in multiplot mode, since it reproduces only the last plot rather than
the entire screen.
See also command-line-editing (p. 17) for ways to edit the last plot (p. 38) (splot (p. 154))
command.
See also show plot (p. 82) to show the whole current plotting command, and the possibility to copy
it into the history (p. 36).
33 Reread
The reread command causes the current gnuplot command file, as specified by a load command or
on the command line, to be reset to its starting point before further commands are read from it. This
essentially implements an endless loop of the commands from the beginning of the command file to
the reread command. (But this is not necessarily a disaster — reread can be very useful when used
in conjunction with if. See if (p. 36) for details.) The reread command has no effect if input from
standard input.
Examples:
Suppose the file "looper" contains the commands
a=a+1
plot sin(x*a)
pause -1
if(a