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