Problem with PointSize
- To: mathgroup at christensen.cybernetics.net
- Subject: [mg1731] Problem with PointSize
- From: vonessen at maths.usc.edu (Nikolaus Vonessen)
- Date: Fri, 21 Jul 1995 00:56:40 -0400
- Organization: University of Southern California, Los Angeles, CA
I have a problem with showing points whose radius is set using PointSize
(or AbsolutePointSize): On the screen, the relative size of the points
is much larger than in the printed version.
To be precise, consider the following mathematica commands:
P=Plot[x^2,{x,-2,2}];
Q=Graphics[{PointSize[0.05],Point[{1,1}]}];
Show[P,Q,GridLines->{{0.8,0.9,1,1.1,1.2},{0.8,0.9,1,1.1,1.2}}];
This plots the parabola x^2, and the point (1,1), plus some gridlines
close to that point, and 0.1 units apart. On the screen, the radius of
the point is about 0.1 units. But if I print the plot, the size of the
point is about 0.3 units. This problem also occurs when using
AbsolutePointSize.
By the way, when running these lines on a 486 using the Student Edition
of Mathematica for Windows, I do not get this strange behavior: There
things work properly. The same on a PowerMac.
My setup: Mathematica for Windows 2.2.2, running on a pentium, and two
different postscript laser printers (HP LaserJet 4M and QMS-PS 810).
Am I doing something wrong? Is this a problem with my system setup, or
is this a mathematica bug? Any suggestions are welcome!
Nikolaus Vonessen,
USC, Department of Mathematics