[R] Artifacts in pdf() of image()

Ben Bolker bolker at ufl.edu
Sun Aug 12 01:31:05 CEST 2007

Michael Kubovy <kubovy <at> virginia.edu> writes:

> Dear r-helpers,
> I have two questions:
> (1) The following produces a pdf with artifacts. How do I prevent them?

  You don't say what the artifacts are, but I suspect
you're seeing the effects of anti-aliasing:


  does it happen when you print?

  On Ubuntu 7.04 I see a grid in evince; not in xpdf
or acrobat reader; and in gv (but I can turn it off with 'a')

  Ben Bolker

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