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MathGroup Archive 2000

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Re: Re: export graphics

  • To: mathgroup at smc.vnet.net
  • Subject: [mg22263] Re: [mg22260] Re: [mg22202] export graphics
  • From: schadow at netcom.ca
  • Date: Sat, 19 Feb 2000 23:50:53 -0500 (EST)
  • References: <200002190634.BAA12480@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

> Wolfgang, and all:
> 
> When we upgraded to version 4 at my institution, I threw together a web
> page (mostly for the benefit of my colleagues here) describing the simplest
> new ways to export graphics.  You can find it here:
> 
> http://www.wittenberg.edu/academics/mathcomp/nicholswww/mmamisc/mmaexport.html
> 
> The simple animated gif example on that page comes down to this:
> 
> sinemovie = Table[
>     Plot[Sin[x - t], {x, 0, 2*Pi}], 
>     {t, Pi/10, 2*Pi, Pi/10}]; 
> 
> Export["sineloop.gif", sinemovie,
>     ConversionOptions -> {"Loop" -> True}];
> 
> You could wrap Block[{$DisplayFunction=Identity},     ] around the Table
> command if you don't want to see the frames before exporting them.
> 
> Part of the reason your attempt (below) went wrong is (perhaps obviously?)
> that Animate returns Null, not Graphics objects.  For the same reason, I
> had to use Table rather than Do in my example above.
> 
> (In the code for Graphics`Animation`, one can see that the last action
> performed by Animate is to explicitly call the low-level function,
> analogous to $DisplayFunction, which displays the frames of the animation,
> by default in the Notebook window.)

Thanks for pointing out your page, it was very helpful to how it's done.
BUT I still get *black* GIFs and JPG's, only EPS works. One way to get
at least a non black curve is:

Needs["Graphics`Colors`"];

anim1 = Plot[Exp[-(x - 1/3)^2], {x, 0, 10}, PlotRange -> {0, 1}, 
    PlotStyle -> {Blue}, Background -> GrayLevel[1]]
Export["anim1.gif", anim1, "GIF"]

This produces a blue curve on black background. This is of course not
satisfactory and fails with PLOT3D. 

I am wondering if this is a Linux specific problem, since you work with
Windows. Is this a known problem or specific to my installation?

Wolfgang

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