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MathGroup Archive 2001

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RE: Graphics Bug (or anomaly anyway)

  • To: mathgroup at smc.vnet.net
  • Subject: [mg28320] RE: [mg28303] Graphics Bug (or anomaly anyway)
  • From: "David Park" <djmp at earthlink.net>
  • Date: Wed, 11 Apr 2001 02:00:59 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Use PlotRange.

  Do[
         Print["nn = ", nn];
         Show[
           Graphics[{AbsolutePointSize[3],
              Table[Point[{n, m}], {n, 0, nn}, {m, 1, nn}]}], 
    PlotRange -> {0.90, nn + 0.1}],  {nn, 5, 8}]

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

> From: aes [mailto:siegman at stanford.edu]
To: mathgroup at smc.vnet.net
> 
> Try executing the following code, which creates a rectangular array of 
> points extending from n=0 to n=nn horizontally and m=1 to m=nn 
> vertically:
> 
>       Do[
>          Print["nn = ", nn];
>          Show[
>            Graphics[
>               Table[Point[{n, m}], {n, 0, nn}, {m, 1, nn}]]],  {nn, 5,8}]
> 
> Then click on the plots to show the bounding boxes.
> 
> For nn<=6 the bounding box is closely wrapped around the array, with the 
> bottom line especially located just a little below the m=1 row.
> 
> For nn>=7 the bottom of the bounding box suddenly drops down one unit 
> and is now located a little below where an m=0 row would be, if there 
> were one.
> 
> If you make the array run only from n=1 and m=1 in both directions, the 
> bounding box wraps tightly all around for nn<=6, but drops back by one 
> unit on both left and bottom sides for nn>=7.
> 
> Try giving a larger PointSize to the points.  If the points are large 
> enough the circular points on the outer boundary of the array get cut 
> off by the bounding box on all 4 sides for nn<=6, but only on the top 
> and two sides, not on the bottom, for n>=7.
> 
> Same thing happens with Circle or Disk -- except bounding box always 
> expands enough so the circles or disks are never cut off.
> 
> Not a serious bug, maybe -- but does produce some minor hassles, e.g., 
> if you're exporting a series of figures at increasing values of nn to go 
> into another application, and counting on the bounding boxes to be all 
> the same size.
> 
> [Mathematica 4.0, Mac PB G3, OS 8.6]
> 


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