Mathematica graphics in a sage notebook

asked 2011-09-21 00:33:54 +0100

Is there an easy way to get Mathematica graphics into a sage notebook?

I have a notebook where I want to compare the Mathematica way of doing things and the related graphics to the sage way and its graphics. The naive ways of doing it do not work:

%mathematica
Plot[Sin[x],{x,-4,4}]

just produces

     -Graphics-

While

mathematica('Plot[Sin[x],{x,-4,4}]')

returns the InputForm of the graphics, i.e.,

Graphics[{{{}, {}, {Hue[0.67, 0.6, 0.6], Line[{<<long list of points>>}], 
         <<some graphics options>>]

There's three work-arounds I can currently think of.

Export the graphics from Mathematica using: Export["file.png", graphics] and import it back into sage - but I couldn't find an image import function in sage...
Use the JavaGraphics Mathematica package: So

but this puts the graphics object in a separate window (not in the sage notebook).

Extract the graphics data and feed it into a sage plotting function, e.g.

list_plot(mathematica('Plot[Sin[x], {x, -4, 4}][[1, 1, 3, 2, 1]]').sage(), plotjoined = true)

which does what I want, but is a little cumbersome - especially for more complicated graphics.

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answered 2011-09-21 21:01:51 +0100

Simon

325 ●4 ●9 ●18 http://www.physics.uwa...

updated 2011-09-21 21:05:23 +0100

Actually, following kcrisman's hint and looking at the sage-notebook thread, it turns out that it's already implemented and so really easy!

In SAGE_ROOT/devel/sage/sage/interfaces/mathematica.py you find the show() function

def show(self, filename=None, ImageSize=600):
    r"""
    Show a mathematica expression or plot in the Sage notebook.

    EXAMPLES::

        sage: P = mathematica('Plot[Sin[x],{x,-2Pi,4Pi}]')   # optional - mathematica
        sage: show(P)                                        # optional - mathematica
        sage: P.show(ImageSize=800)                          # optional - mathematica
        sage: Q = mathematica('Sin[x Cos[y]]/Sqrt[1-x^2]')   # optional - mathematica
        sage: show(Q)                                        # optional - mathematica
        <html><div class="math">\frac{\sin (x \cos (y))}{\sqrt{1-x^2}}</div></html>
    """

that does exactly what I wanted.

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But will they show up without the "show"? Anyway, glad you are happy :) But it would be nice for it to work in the %mathematica mode as well.

kcrisman ( 2011-09-22 16:20:59 +0100 )edit

It still doesn't work for me, here's what I get for: mathematica -Graphics- Out[3]= mathematica show -Graphics-

enedene ( 2011-10-20 09:56:01 +0100 )edit

Can you either make a new answer with *exactly* what commands don't work for you, or a new question which references this question? Thanks!

kcrisman ( 2011-10-20 15:16:22 +0100 )edit

@kcrisman, I'll ask another question first thing tomorrow. Thank you for your interest.

enedene ( 2011-10-21 19:05:14 +0100 )edit

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answered 2011-09-21 09:28:38 +0100

kcrisman
12242 ●42 ●136 ●255

You may want to look at how this is implemented for R or other external programs. See this thread for this. You may need to implement several commands in the Mma interface, a chdir or something else; it's different for each program.

Short version: essentially, you need to make sure the output of the program (the graphic file itself) ends up in the correct directory for the cell in the notebook. Good luck!

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Thanks kcrisman - the thread you linked to shows that what I want is already implemented! See my answer.

Simon ( 2011-09-21 20:59:33 +0100 )edit

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answered 2011-09-22 18:03:00 +0100

Dirk Danckaert
271 ●4 ●9 ●20

I'm not sure this is really relevant, and I don't have any experience with Mathematica worth mentioning, but I just want to address part (1) of your question, about importing images to SAGE. If you use the Notebook interface to sage (in stead of a command shell) it's actually quite simple: open the [Data] dropdown menu above the worksheet and upload an image file to your worksheet. You can then insert the image in a text cell, as an html image.

Sorry if I'm only stating the obvious.

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It is relevant and useful. I knew how to add images into a text/html cell, but I had never used the data menu before. Thanks!

Simon ( 2011-09-25 21:07:11 +0100 )edit

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