loop in gnuplot ? - Graphics

Cecile Hebert <cecile.hebert@tuwien.ac.at> wrote:
> Hello,

> For an animated gif, I will need about 25 frames. Is there a way to
> generate them directly with gnuplot (I am using the 4.0 version) or do I
> need to make an external script ?

Gnuplot can do loops, but it's a bit tricky. See 'help reread', 'help if'
and the 'animate.dem' example.

--
Hans-Bernhard Broeker (broeker@physik.rwth-aachen.de)
Even if all the snow were burnt, ashes would remain.

On 2006-08-27, Cecile Hebert <cecile.hebert@tuwien.ac.at> wrote:

> For an animated gif, I will need about 25 frames. Is there a way to
> generate them directly with gnuplot (I am using the 4.0 version) or do I
> need to make an external script ?

You can call a file use a recursively.

I find it's almost always faster and easier to write a small
Python program (using http://gnuplot-py.sourceforge.net/) when
you want to anything complex like that.

--
Grant Edwards grante Yow! MMM-MM!! So THIS is
at BIO-NEBULATION!
visi.com

In article <slrnef2l8d.qto.cecile.hebert@garfield.atp.tuwien.ac.at>,
Cecile Hebert <cecile.hebert@tuwien.ac.at> wrote:
>
>For an animated gif, I will need about 25 frames. Is there a way to
>generate them directly with gnuplot (I am using the 4.0 version) or do I
>need to make an external script ?

Version 4.0
You could use a "reread" loop to make the individual frames
but you will need a script of some sort to compile them into
an animation

Version 4.1
Supports "set term gif animate"


See
http://gnuplot.sourceforge.net/demo_4.2/animate2.html

--
Ethan A Merritt

On 2006-08-27, Grant Edwards <grante@visi.com> wrote:
> On 2006-08-27, Cecile Hebert <cecile.hebert@tuwien.ac.at> wrote:
>
>> For an animated gif, I will need about 25 frames. Is there a way to
>> generate them directly with gnuplot (I am using the 4.0 version) or do I
>> need to make an external script ?
>
> You can call a file use a recursively.
>
> I find it's almost always faster and easier to write a small
> Python program (using http://gnuplot-py.sourceforge.net/) when
> you want to anything complex like that.

Yes, I did it with a shell script, it is just a few lines.

Thanks
Cecile


>


--
Dr. Cécile Hébert, Inst. f. Festkörperphysik
TU Wien, Wiedner Hauptstrasse 8-10 A-1040 WIEN
cecile.hebert@tuwien.ac.at tel +43 1 58 801 138 15 fax - 138 99
http://tem.atp.tuwien.ac.at/leute/cecile.html
http://www.ncc.at/cecile/photos/index.html

Ethan Merritt wrote:

> You could use a "reread" loop to make the individual frames
> but you will need a script of some sort to compile them into
> an animation

I am not at all experienced in hacking the gnuplot source code,
but wouldn't it be a fairly simple (and useful) extension to
clone the code taking care of the "if" statement and turn it
into code implemeting a similarly working "while" statement?

i.e.

i = 0
while (i < 10) plot sin(x+i); i = i+0.1

perhaps a suggestion for v. 4.x?