Hi Duncan, I was trying to learn to remove the artifacts by setting the parameters of the image so that anti-aliasing wouldn't produce them (analogous to making sure that the screens of two halftone screen process images are in register before combining them so as to avoid Moiré patterns). So, I wasn't complaining; I was looking for instruction. Since the image was computed with R, it's reasonable for me to ask R experts to help me out of what I thought was caused by my ineptitude. (Regarding your question, "If it wasn't a bug, why did it bother you so much?"---there are many things that bother me that are not bugs.)
Moreover, I'm not opposed to complaining to Apple, once I have been assured that I'm not reporting a bug where there's none. On Aug 13, 2007, at 9:56 AM, Duncan Murdoch wrote: > On 8/13/2007 11:43 AM, Michael Kubovy wrote: >> But is it a bug? Can a program anti-alias text and line drawings >> and not bitmaps? > > Anti-aliasing is the removal of artifacts caused by displaying an > image on a low-resolution bitmapped display. Introducing artifacts > is a bug. > > If it wasn't a bug, why did it bother you so much? And why do you > think it's reasonable to complain about it on R-help, but not to > complain about it to Apple, who are clearly responsible for it? > > Duncan Murdoch > >> On Aug 13, 2007, at 9:30 AM, Duncan Murdoch wrote: >>> On 8/13/2007 11:07 AM, Michael Kubovy wrote: >>>> Dear Friends, >>>> Thanks for your input. >>>> FYI: Preview doesn't show PDF aliasing in the image I produced >>>> if I uncheck the "Anti-alias text and line art" box under the >>>> PDF tab in Preferences. So I'm not yet ready to drop Preview >>>> from my toolbox. >>> >>> An alternative to dropping Preview is to report the bug in it to >>> Apple. Apple has an online bug reporting web page somewhere; I >>> haven't found them as helpful as R-help, but your mileage may vary. >>> >>> Duncan Murdoch >> _____________________________ >> Professor Michael Kubovy >> University of Virginia >> Department of Psychology >> USPS: P.O.Box 400400 Charlottesville, VA 22904-4400 >> Parcels: Room 102 Gilmer Hall >> McCormick Road Charlottesville, VA 22903 >> Office: B011 +1-434-982-4729 >> Lab: B019 +1-434-982-4751 >> Fax: +1-434-982-4766 >> WWW: http://www.people.virginia.edu/~mk9y/ _____________________________ Professor Michael Kubovy University of Virginia Department of Psychology USPS: P.O.Box 400400 Charlottesville, VA 22904-4400 Parcels: Room 102 Gilmer Hall McCormick Road Charlottesville, VA 22903 Office: B011 +1-434-982-4729 Lab: B019 +1-434-982-4751 Fax: +1-434-982-4766 WWW: http://www.people.virginia.edu/~mk9y/ ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.