Example of the ipython notebook usage

[Ondrej Certik]

Hi,

Attached is a screenshot of a real life usage of the "qsnake --lab" at
my work. This is the sort of interactive usage, that was not possible
previously,
as I was just saving plots as png images to disk, and that's very slow
for explorative work.

Ondrej

[William Stein]

Hmm. I can't tell that it isn't just a png from the screenshot!
Can you make a little screencast/movie and post it on youtube or something?

>
> Ondrej
>

--
William Stein
Professor of Mathematics
University of Washington
http://wstein.org

[William Stein]

On Tue, May 10, 2011 at 7:55 PM, William Stein <wst...@gmail.com> wrote:
> On Tue, May 10, 2011 at 4:05 PM, Ondrej Certik <ond...@certik.cz> wrote:
>> Hi,
>>
>> Attached is a screenshot of a real life usage of the "qsnake --lab" at
>> my work. This is the sort of interactive usage, that was not possible
>> previously,
>> as I was just saving plots as png images to disk, and that's very slow
>> for explorative work.
>
> Hmm.  I can't tell that it isn't just a png from the screenshot!
> Can you make a little screencast/movie and post it on youtube or something?

Hi,

I didn't realize I was just writing to a mailing list. No offense
intended. I do think a video would be nice, for the lazy people
like me who haven't installed everything yet.

-- William

[Ondrej Certik]

Hi William,

On Tue, May 10, 2011 at 7:56 PM, William Stein <wst...@gmail.com> wrote:
> On Tue, May 10, 2011 at 7:55 PM, William Stein <wst...@gmail.com> wrote:
>> On Tue, May 10, 2011 at 4:05 PM, Ondrej Certik <ond...@certik.cz> wrote:
>>> Hi,
>>>
>>> Attached is a screenshot of a real life usage of the "qsnake --lab" at
>>> my work. This is the sort of interactive usage, that was not possible
>>> previously,
>>> as I was just saving plots as png images to disk, and that's very slow
>>> for explorative work.
>>
>> Hmm.  I can't tell that it isn't just a png from the screenshot!
>> Can you make a little screencast/movie and post it on youtube or something?
>
> Hi,
>
> I didn't realize I was just writing to a mailing list.  No offense
> intended.    I do think a video would be nice, for the lazy people
> like me who haven't installed everything yet.

Thanks for the email. It is just a png image (e.g. nothing more than
the Sage notebook can do for years). I should have been more clear
in my email: "it was not possible to do before in Qsnake", as I was
just using the terminal based ipython, and no matplotlib gui was
working for me,
so I was saving images to disk with savefig(), and opening them in
another terminal using "eog" (image viewer in Ubuntu).

One possible cool thing that the ipython protocol allows (not
implemented in the html frontend yet I think) is that it allows to
have two views of the same session. So I can imagine starting a
session in a terminal, and then when realizing that I need to do a few
plots, attach a web notebook, do a few plots in the same session (e.g.
reusing variables) etc.

However, when I got this working (an it uses websockets), the html5
canvas for matplotlib is on my todo list. That should be fully
interactive.

Ondrej