The `reread` command causes the current `gnuplot` (Note:gnuplot ) command
file, as specified by a `load` (Note: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` (Note:if ). See if 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<5) reread
and from within `gnuplot` you submit the commands
a=0
load 'looper'
The result will be four plots (separated by the `pause` (Note:pause )
message).
Suppose the file "data" contains six columns of numbers with a total yrange
from 0 to 10; the first is x and the next are five different functions of x.
Suppose also that the file "plotter" contains the commands
c_p = c_p+1
plot "$0" using 1:c_p with lines linetype c_p
if(c_p < n_p) reread
and from within `gnuplot` you submit the commands
n_p=6
c_p=1
set nokey
set yrange [0:10]
set multiplot
call 'plotter' 'data'
set nomultiplot
The result is a single graph consisting of five plots. The yrange must be
set explicitly to guarantee that the five separate graphs (drawn on top of
each other in multiplot mode) will have exactly the same axes. The linetype
must be specified; otherwise all the plots would be drawn with the same type.