Dan Drake wrote:
> On Thu, 02 Apr 2009 at 10:33PM +0200, Florent Hivert wrote:
>> One thing which is very useful in algebraic combinatorics (or maybe
>> more modestly in my team), is to have printed out formulas with
>> pictures in it. By picture in include 2D arrays as well as trees,
>> graphs... In MuPAD we had a way to get very handy uglyprint asciiarts:
>
> I would love this too!
>
> [...]
>> It would be very useful to a way to get such outputs in sage. By such
>> outputs I don't mean asciiart, but any formulas involving pictures. As
>> show on the picture it seems that I can get this in emacs via latex /
>> sage-view. So my question is: can anyone direct me to a start of a
>> path to have these in the notebook ?
>
> Along similar lines is something I've been thinking about, which is
> support for producing TikZ code from Sage objects so that we can easily
> produce lovely TeX graphics. TikZ is a bit like PSTricks, but with
> much wider support and better syntax; see [1] and [2] for examples of
> what TikZ can do.
I've been wanting this for a long time too. Also, it would be great if
matplotlib had a pgf/tikz backend, for example. I did some playing
around with writing one based on the ps backend, but only got a little
ways along. There have been posts on the matplotlib mailing list about
this too.
For the notebook, it would be nice to output some sort of html5/canvas
code or some svg code inside of a div. I think that might be enough to
have nice graphics in output in the notebook.
>
> I would like to see Sage objects be able to spit out a reasonable TikZ
> representation. For example, the integer partition [4,4,2,1] might
> produce:
>
> % part: 4
> \draw (0,0) rectangle (1,-1);
> \draw (1,0) rectangle (2,-1);
> \draw (2,0) rectangle (3,-1);
> \draw (3,0) rectangle (4,-1);
> % part: 4
> \draw (0,-1) rectangle (1,-2);
> \draw (1,-1) rectangle (2,-2);
> \draw (2,-1) rectangle (3,-2);
> \draw (3,-1) rectangle (4,-2);
> % part: 2
> \draw (0,-2) rectangle (1,-3);
> \draw (1,-2) rectangle (2,-3);
> % part: 1
> \draw (0,-3) rectangle (1,-4);
>
> which would produce the typical (English convention) Ferrers diagram.
> The above code can be put inside \begin{tikzpicture} ...
> \end{tikzpicture}.
>
> It would be nice to be able to output combinatorial objects as in
> Florent's message above, and also plots and other graphical objects.
> I've had these ideas for a while, but have never really done anything
> with them, and they seem to be related to implementing ASCII graphics
> for the command line.
>
> Dan
>
> 1. http://mathsci.kaist.ac.kr/~drake/pdf/lineary-sys-stability.pdf
This link doesn't seem to work for me: "The requested URL
/~drake/pdf/lineary-sys-stability.pdf was not found on this server."
Thanks,
Jason
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