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MathGroup Archive 1995

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Re: More Graphic Bugs

  • To: mathgroup at christensen.cybernetics.net
  • Subject: [mg1233] Re: [mg1212] More Graphic Bugs
  • From: Richard Mercer <richard at seuss.math.wright.edu>
  • Date: Fri, 26 May 1995 04:20:00 -0400

>  Another Bug in Graphics. This one come up totally
>  unexpected. In the following code, you will see a red
>  dot about 25 pixel in diameter at location {4,.5}. WHERE
>  DOES THIS DOT COME FROM?
>  

>  Plot[ { Sin@x }, {x,0, 6},
>  	AspectRatio->Automatic, PlotRange->All,
>  	PlotStyle->{{Hue[0],Thickness[.09]}},
>  Prolog->{Thickness[.04],Line[{{-1,0.5},{4,.5}}]}
>  ]

The Red Dot is a punishment from the Mathematica Gods for using 

the horrible notation { Sin@x } instead of just Sin[x]. Ugh!
Seriously, this is a good one. It is apparently some sort of
Postscript problem that starts graphing where the Prolog ended rather than  
where the graph starts. It appears to be device-independent. (It happens on my  
NeXT, which generally does well with postscript.)
>  

>  Btw, should I also send these to WRI tech support? Do
>  they read MathGroup?

Yes and Yes.
Steve Christensen has repeatedly said to send bug reports to WRI first.

Richard Mercer


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