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Re: Question: How to display matrixes with a tube-defined figure

  • To: mathgroup at
  • Subject: [mg29652] Re: Question: How to display matrixes with a tube-defined figure
  • From: Jens-Peer Kuska <kuska at>
  • Date: Mon, 2 Jul 2001 02:20:14 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <9hh5dt$93j$>
  • Sender: owner-wri-mathgroup at


the question about the combination of a bitmap image
with an ordinary graph was posted recently, here is my
answer again


If you import an image, it had the xy-box of the pixel dimensions
but you need the plane area of your contour plot. 
The simplest way to do it is

yourBitmap = Import["/export/home/kuska/mathpng2/Pictures/tigerg.png"];

ContourPlot[Sin[x*y], {x, 0, Pi}, {y, 0, Pi}, ContourShading -> False, 
  Prolog -> {yourBitmap[[1]] /. 
                 Raster[bm_, rr_, more___] :> 
                    {{0, 0}, {Pi, Pi}}, (* Place here the new bound 
                                           used in the contour plot *)

be sure to set the shading to false (otherwise the polygons
overlay the bitmap).  Set the bounds of the Raster[] object
to your area in the xy-plane used in the contour plot.

You can use any 2d grpahics but you must ensure the correct
xy-Range. For 3d objects the prior conversion to a 2d graphics
may usefull.


Heiko Pliefke wrote:
> Hy,
> i'm a member of an multimedia project on a german school and our team has
> the the task to make a short animated film with mathematica. my problem is
> very difficult, i think.
> Our team want to animate a figure build with mathematic functions like x².
> We realized the figure with the TUBE- (or TUBE3D-) -command. Now we want
> include the name of our school in the animation. To do this, we scanned the
> school's logo and imported the gif-file to mathematica using the
> IMPORT-command. Our problem now is, that we aren't able to show our
> tube-figure and the logo (saved as a matrix) together by using the
> SHOW-command.
> Another problem is the LISTDENSITYPLOT-command. With this command the logo
> only can be plotted in black color but we want it in another one.
> If anybody can help me and my team with (one of) our problems please post it
> our mail me at: heikopliefke at
> Thanks for your help,
> Heiko P.
> Please excuse my english, i'm a german pupil but i tried to wrote a good
> english.

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