gnuplot on Canvas widget

[Blues]

Hey,

I have used two great models - Tkinter and Gnuplot.py - for a while. I
can display an image on a Canvas widget using Tkinter and I can also
generate a gnuplot from Python on the fly in a separate window. Does
anyone know how to display such a gnuplot on the Canvas widget with an
image in it? Thanks.

Michael

[Jonathan Ellis]

Re: gnuplot on Canvas widget

Blues wrote:[color=blue]
> I have used two great models - Tkinter and Gnuplot.py - for a while.[/color]
I[color=blue]
> can display an image on a Canvas widget using Tkinter and I can also
> generate a gnuplot from Python on the fly in a separate window. Does
> anyone know how to display such a gnuplot on the Canvas widget with[/color]
an[color=blue]
> image in it? Thanks.[/color]
[color=blue]
>From my experience, the Gnuplot module isn't designed to be used in[/color]
"headless" mode -- it can save to the usual formats, but you have to
render everything in an x11 window interactively first.
It might not be hard to modify this, though.

-Jonathan

[Blues]

Re: gnuplot on Canvas widget

Thanks, Jonathan. Can you please give a little more information here?

[Fernando Perez]

Re: gnuplot on Canvas widget

Jonathan Ellis wrote:
[color=blue]
> Blues wrote:[color=green]
>> I have used two great models - Tkinter and Gnuplot.py - for a while.[/color]
> I[color=green]
>> can display an image on a Canvas widget using Tkinter and I can also
>> generate a gnuplot from Python on the fly in a separate window. Does
>> anyone know how to display such a gnuplot on the Canvas widget with[/color]
> an[color=green]
>> image in it? Thanks.[/color]
>[color=green]
>>From my experience, the Gnuplot module isn't designed to be used in[/color]
> "headless" mode -- it can save to the usual formats, but you have to
> render everything in an x11 window interactively first.
> It might not be hard to modify this, though.[/color]

That's not correct. I have tons of Gnuplot.py based scripts which write
directly to EPS output, without ever opening a gui window. Note that Gnuplot
still tries to initialize the X11 terminal at startup, so they would require
modifications to run over ssh without X forwarding.

The default plot() command in Gnuplot.py doesn't make it too convenient to do
this, but it's possible. The Gnuplot support in ipython
(http://ipython.scipy.org) extends the syntax of the plot() command to make
it trivial to render to EPS without a terminal. It shouldn't be hard to
modify this to render to other formats, while avoiding opening an X11 window.

Best,

f