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MathGroup Archive 1998

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Re: Stacking Graphics

  • To: mathgroup at
  • Subject: [mg13342] Re: [mg13245] Stacking Graphics
  • From: "Jens-Peer Kuska" <kuska at>
  • Date: Mon, 20 Jul 1998 02:49:59 -0400
  • Sender: owner-wri-mathgroup at

Hi Eric,

the combination of a 3d surface with a contour plot will probably not
work. The reason are the polygons of the contour plot. The polygons in
the contour graphics are non-convex, in 2d this does not matter but the
3d extension fails
because Mathematica can not render 3d non-convex polygons.

If You need the color information You must combine a density graphics
with your 3d surface. You can look to the ShadowPlot3D[] function from

If the lines of the contour plot are sufficient You may try something

(* Make a surface ...*)

(* and a ContourPlot *)

(* Define the height position of the contour lines *) zpos=-3.5;

      Graphics3D[surf], (* make a 3d graphics form the surface *)
        First[Graphics[cntr]] /.{ p_Polygon :> Sequence[], (* make a 2d
graphics from the

ContourGraphics  and remove the polygons *)
            Line[pnts_]:> Line[Append[#,zpos] & /@ pnts]}]} (* extend
the 3d lines to 3d *)

Hope that  helps
-----Original Message-----
From: Eric R. Bittner <bittner at UH.EDU> To: mathgroup at
Subject: [mg13342] [mg13245] Stacking Graphics

>Dear FellowMathGroupers:
>I need to combine a three dimensional list plot of a one set of data
>with a contour plot of another set of data.  Is there a relatively
>straight forward to do this?
>Eric R. Bittner                 bittner at Dept. of Chemistry
>ph: 713-743-2775 University of Houston          fax: 713-743-2709
>Houston TX 77204    
> "confutatis maledictis, flammis acribus addictis..."

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