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MathGroup Archive 2006

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RE: FilledListPlot with StackGraphics

  • To: mathgroup at smc.vnet.net
  • Subject: [mg66798] RE: [mg66765] FilledListPlot with StackGraphics
  • From: "David Park" <djmp at earthlink.net>
  • Date: Tue, 30 May 2006 05:49:32 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Seo Ho,

You could skip FilledListPlot and try something like the following.

data = {{1, 1}, {2, 1}, {2, 2}, {3, 2}};

data2 = Partition[data, 2, 2]
{{{1, 1}, {2, 1}}, {{2, 2}, {3, 2}}}

data3 = data2 /. {{x1_?NumericQ, y1_}, {x2_, y2_}} ->
      Polygon[{{x1, 0}, {x1, y1}, {x2, y2}, {x2, 0}}]
{Polygon[{{1, 0}, {1, 1}, {2, 1}, {2, 0}}],
  Polygon[{{2, 0}, {2, 2}, {3, 2}, {3, 0}}]}

Show[StackGraphics[Graphics@data3]]

Or you could also dispense with StackGraphics and write a routine that will
convert your list specification to 3d Polygons at a specific y value.

data3d[data2d_, y_] :=
  Module[{work},
    work = Partition[data2d, 2, 2];
    work /. {{x1_?NumericQ, z1_}, {x2_, z2_}} ->
        Polygon[{{x1, y, 0}, {x1, y, z1}, {x2, y, z2}, {x2, y, 0}}]
    ]

data1 = {{1, 1}, {2, 1}, {2, 2}, {3, 2}, {3, 1/2}, {4, 1/2}};
data2 = {{1, 1}, {2, 1}, {2, 3}, {3, 3}, {3, 1}, {4, 1}};

Show[
  Graphics3D[
    {data3d[data1, 1],
     data3d[data2, 2]}]

You might also be able to simplify how you specify and process your lists of
data. It is almost always easier to work directly with primitive graphics
objects than to try to twist some of the Mathematica plot types to special
use.

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/



From: Seo Ho Youn [mailto:ysh7873 at hotmail.com]
To: mathgroup at smc.vnet.net


Hi, all.



I am trying to use FilledListPlot with StackGraphics. The plot of
FilledListPlot looks fine, but when I bring it to 3D with StackGraphics, it
``overfilled''. I know that I can use Fills-> White in order not to show
this overfilled region. However, since I am trying to use several layers,
this overfilled region blocks the ones behind it. Here's my simplified code.



<<Graphics`FilledPlot`

<<Graphics`Graphics3D`



FLP = FilledListPlot[{{1, 1}, {2, 1}, {2, 2}, {3, 2}}];

Show[StackGraphics[FLP]];



In my code, there is a step plot in FilledListPlot. However, in 3D
(StackGraphics), there is an extra filled triangle with points (1,1), (2,1),
and (2,2), which is not filled in FilledListPlot.



How can I get rid of this extra filled region?



Thank you for reading. Have a good day.



Seo Ho





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