On Dec 12, 2007 12:22 PM, kcrisman <[EMAIL PROTECTED]> wrote:
>
>
>
>
> >
> > > The question:
> > > Is there any way to get SAGE to update a graphic without actually
> > > creating a new graphic, either in command-line mode or in notebook?
> >
> > Would creating an animation be a reasonable substitute?
> > E.g.,
> >
> > {{{id=119|
> > a = random_matrix(GF(37),10)*10
> > b = [a^i for i in [1..37]]
> >
> > }}}
> >
> > {{{id=122|
> > A = animate(matrix_plot(x) for x in b)
> >
> > }}}
> >
> > {{{id=120|
> > show(A)
> >
> > }}}
>
> Oh, yes, this is exactly it - I feel a little silly for not thinking
> of searching for "animate".
>
> Though it is still not at all easy to figure out how to do it. You
> have to think of animate; then you have to figure out that the mystery
> error message about 'convert' means you should find Imagemagick; then
> you have to figure out how to get it and unpack it (luckily I have
> Fink), etc. So another example of a steepish learning curve. Still,
> good to know how to do it. Actually, animate has some very
> interesting methods - I am really looking forward to trying the
> addition of animations!
I totally agree. It would be great if somebody new of a simple
lightweight tool or way to assemble a bunch of png's together
into an animated gif -- I used convert (via imagemagick) since
it was the only thing I could find that works. Regarding
the lack of a good error message that explains what convert
is, how to install it, etc., that is mainly because I wrote the animate
command pretty recently specifically for a high-school workshop I was
running, and didn't have to worry about convert not being
available. animate hasn't got the additional polish it deserves.
> On a different note (and I don't know what people think of this, as
> it's not really SAGE) I noticed two problems, perhaps unique to Mac,
> after the SAGE stuff is resolved. First, if you do it command-line,
That's a good point -- that should be changed.
> Preview opens the animated .gif up automatically and won't play it (it
> lists all the individual frames), and I couldn't even save it there,
> nor drag it into a browser to play it (had to dig into the .sage
> directory in Terminal to do this). Second, when I do it in the
> browser, it just plays forever like any other dorky animated .gif on a
> 1995-vintage website. Is this a bug or a feature?
Animate *is* outputting a dorky animated .gif 1995-vintage style.
The con is that it looks dorky. The pro is that you can save that give
and trivially put it on any web page, etc.
I've made this all trac #1483:
http://trac.sagemath.org/sage_trac/ticket/1483
I hope somebody works on it.
-- William
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