Saving and Loading from a File
Gnuplot lets you load a series or commands in from a file.
This is useful when you are trying to "tweak" a lengthy expression to
get the output that you want. If you haven't used an UNIX editor
before, you will probably want to start with PICO. You can
start it within a terminal window by typing pico, or you can
select it from the Editors menu of the Wright Hall Menu. For
information on how to use Pico, see here. For instance, you might need to enter
the following lines to get a graph that you want.
You could put this in your home directory in a file called, for
instance, "work.gnu". Then to run these commands, you would type the
following in GnuPlot:
Or if the file is in a differant
- set time
- set title "File Graph"
- set hidden3d
- set xrange [-5:5]
- set yrange [-5:5]
- set isosamples 50
- # Actually Plot the Graph
- splot exp(-x**2 - y**2) -cos(y)-(x**2)/5
is on the system, if you want to try it, type
- load 'web/gnuplot/work.gnu'
The line beginning with the "#" is a comment line. You can put
these in your text files as comments to yourself.
- load '/opt/Gnu/info/gp/work.gnu'
If you want to put the file in another directory than your home
directory, you just need to use the cd command in
GnuPlot. First, to see what directory you are in, type the following:
You should see something like "/user/bos", where your username is in
place of "bos". To change directories, just use the cd command as follows:
Adding Pauses, Looping Animations
To make changing GnuPlot graphics, you can specify multiple plots, and
just put pause statements between them. For more information,
see help pause. For an example, type load
'/opt/Gnu/info/gp/work2.gnu'. Also, if you put a reread
statement into your text file, it causes GnuPlot to go the beginning
of the file, and keep looping. For more information, see help
reread, and for an example, type load
'/opt/Gnu/info/gp/work3.gnu'. To exit the loop, hit
Control-C in the GnuPlot window.
The option that GnuPlot gives for saving work is the save
command. If you type the following:
GnuPlot will then create a text file with the name you gave it that
includes set commands for every possible setting in
GnuPlot. You can then load this file to continue work where you left off.
Table of Contents - Previous - Outputing to a Graphics file - Next - Using a LogScale
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Last Modified: 11/5/96